diff --git a/src/app/landing-page/landing-page.component.html b/src/app/landing-page/landing-page.component.html
index 5144be66..81ca14db 100644
--- a/src/app/landing-page/landing-page.component.html
+++ b/src/app/landing-page/landing-page.component.html
@@ -82,92 +82,92 @@ <h4>Nicolaus Fuss</h4>
 
         <mat-divider></mat-divider>
 
-        <section>
-            <!--<h3 mat-card-subtitle>Leonhardi Euleri Opera Omnia (LEOO)</h3>-->
-            <h2 mat-card-title>Leonhard Euler's correspondence with Goldbach</h2>
-            <div class="leoo-section">
-                <div class="container">
-                    <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>
-                        <div fxFlex routerLink="introduction/leoo/goldbach_preface">
-                            <mat-card class="intro-card" appearance="outlined">
-                                <mat-card-content>Preface</mat-card-content>
-                            </mat-card>
-                        </div>
-                        <div fxFlex routerLink="introduction/leoo/goldbach_abbreviations">
-                            <mat-card class="intro-card" appearance="outlined">
-                                <mat-card-content>List of Abbreviations</mat-card-content>
-                            </mat-card>
-                        </div>
-                    </div>
-                </div>
-
-                <p fxLayout="column"><strong>Introduction</strong></p>
-                <div class="container">
-                    <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>
-                        <div fxFlex routerLink="introduction/leoo/goldbach_introduction_1">
-                            <mat-card class="intro-card" appearance="outlined">
-                                <mat-card-content>Historical and biographical setting</mat-card-content>
-                            </mat-card>
-                        </div>
-                        <div fxFlex routerLink="introduction/leoo/goldbach_introduction_2">
-                            <mat-card class="intro-card" appearance="outlined">
-                                <mat-card-content>Main subjects of the correspondence</mat-card-content>
-                            </mat-card>
-                        </div>
-                        <div fxFlex routerLink="introduction/leoo/goldbach_introduction_3.1">
-                            <mat-card class="intro-card" appearance="outlined">
-                                <mat-card-content>Editing the Euler-Goldbach correspondence</mat-card-content>
-                            </mat-card>
-                        </div>
-                    </div>
-                </div>
-
-            </div>
-
-            <div class="leoo-section">
-                <app-correspondence [project]="'leooIV'"></app-correspondence>
-            </div>
-
-        </section>
-
-        <mat-divider></mat-divider>
-
-        <section>
-            <!--<h3 mat-card-subtitle>Leonhardi Euleri Commercium Epistolicum (LECE)</h3>-->
-            <h2 mat-card-title>Correspondance d'Euler avec Condorcet et Turgot</h2>
-
-            <div class="leoo-section">
-                <div class="container">
-                    <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>
-                        <div fxFlex routerLink="introduction/lece/CondorcetTurgot_preface">
-                            <mat-card class="intro-card" appearance="outlined">
-                                <mat-card-content>Préface</mat-card-content>
-                            </mat-card>
-                        </div>
-                    </div>
-                </div>
-            </div>
-            <p fxLayout="column"><strong>Introduction</strong></p>
-            <div class="container">
-                <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>
-                    <div fxFlex routerLink="introduction/lece/CondorcetMJA_Introduction">
-                        <mat-card class="intro-card" appearance="outlined">
-                            <mat-card-content>Correspondance d'Euler avec Condorcet</mat-card-content>
-                        </mat-card>
-                    </div>
-                    <div fxFlex routerLink="introduction/lece/Turgot_Introduction">
-                        <mat-card class="intro-card" appearance="outlined">
-                            <mat-card-content>Correspondance d'Euler avec Turgot</mat-card-content>
-                        </mat-card>
-                    </div>
-                </div>
-            </div>
-            <div class="lece-section">
-                <app-correspondence [project]="'lece'"></app-correspondence>
-            </div>
-        </section>
-
-        <mat-divider></mat-divider>
+<!--        <section>-->
+<!--            &lt;!&ndash;<h3 mat-card-subtitle>Leonhardi Euleri Opera Omnia (LEOO)</h3>&ndash;&gt;-->
+<!--            <h2 mat-card-title>Leonhard Euler's correspondence with Goldbach</h2>-->
+<!--            <div class="leoo-section">-->
+<!--                <div class="container">-->
+<!--                    <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>-->
+<!--                        <div fxFlex routerLink="introduction/leoo/goldbach_preface">-->
+<!--                            <mat-card class="intro-card" appearance="outlined">-->
+<!--                                <mat-card-content>Preface</mat-card-content>-->
+<!--                            </mat-card>-->
+<!--                        </div>-->
+<!--                        <div fxFlex routerLink="introduction/leoo/goldbach_abbreviations">-->
+<!--                            <mat-card class="intro-card" appearance="outlined">-->
+<!--                                <mat-card-content>List of Abbreviations</mat-card-content>-->
+<!--                            </mat-card>-->
+<!--                        </div>-->
+<!--                    </div>-->
+<!--                </div>-->
+
+<!--                <p fxLayout="column"><strong>Introduction</strong></p>-->
+<!--                <div class="container">-->
+<!--                    <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>-->
+<!--                        <div fxFlex routerLink="introduction/leoo/goldbach_introduction_1">-->
+<!--                            <mat-card class="intro-card" appearance="outlined">-->
+<!--                                <mat-card-content>Historical and biographical setting</mat-card-content>-->
+<!--                            </mat-card>-->
+<!--                        </div>-->
+<!--                        <div fxFlex routerLink="introduction/leoo/goldbach_introduction_2">-->
+<!--                            <mat-card class="intro-card" appearance="outlined">-->
+<!--                                <mat-card-content>Main subjects of the correspondence</mat-card-content>-->
+<!--                            </mat-card>-->
+<!--                        </div>-->
+<!--                        <div fxFlex routerLink="introduction/leoo/goldbach_introduction_3.1">-->
+<!--                            <mat-card class="intro-card" appearance="outlined">-->
+<!--                                <mat-card-content>Editing the Euler-Goldbach correspondence</mat-card-content>-->
+<!--                            </mat-card>-->
+<!--                        </div>-->
+<!--                    </div>-->
+<!--                </div>-->
+
+<!--            </div>-->
+
+<!--            <div class="leoo-section">-->
+<!--                <app-correspondence [project]="'leooIV'"></app-correspondence>-->
+<!--            </div>-->
+
+<!--        </section>-->
+
+<!--        <mat-divider></mat-divider>-->
+
+<!--        <section>-->
+<!--            &lt;!&ndash;<h3 mat-card-subtitle>Leonhardi Euleri Commercium Epistolicum (LECE)</h3>&ndash;&gt;-->
+<!--            <h2 mat-card-title>Correspondance d'Euler avec Condorcet et Turgot</h2>-->
+
+<!--            <div class="leoo-section">-->
+<!--                <div class="container">-->
+<!--                    <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>-->
+<!--                        <div fxFlex routerLink="introduction/lece/CondorcetTurgot_preface">-->
+<!--                            <mat-card class="intro-card" appearance="outlined">-->
+<!--                                <mat-card-content>Préface</mat-card-content>-->
+<!--                            </mat-card>-->
+<!--                        </div>-->
+<!--                    </div>-->
+<!--                </div>-->
+<!--            </div>-->
+<!--            <p fxLayout="column"><strong>Introduction</strong></p>-->
+<!--            <div class="container">-->
+<!--                <div fxFlex fxLayout="row wrap" fxLayout.sm="column" fxlayout.xs="column" fxFlexFill>-->
+<!--                    <div fxFlex routerLink="introduction/lece/CondorcetMJA_Introduction">-->
+<!--                        <mat-card class="intro-card" appearance="outlined">-->
+<!--                            <mat-card-content>Correspondance d'Euler avec Condorcet</mat-card-content>-->
+<!--                        </mat-card>-->
+<!--                    </div>-->
+<!--                    <div fxFlex routerLink="introduction/lece/Turgot_Introduction">-->
+<!--                        <mat-card class="intro-card" appearance="outlined">-->
+<!--                            <mat-card-content>Correspondance d'Euler avec Turgot</mat-card-content>-->
+<!--                        </mat-card>-->
+<!--                    </div>-->
+<!--                </div>-->
+<!--            </div>-->
+<!--            <div class="lece-section">-->
+<!--                <app-correspondence [project]="'lece'"></app-correspondence>-->
+<!--            </div>-->
+<!--        </section>-->
+
+<!--        <mat-divider></mat-divider>-->
 
         <section class="third-party-projects">
             <h3>Third Party Projects</h3>