added xlsx to json lib script on the header

public/index.html

@@ -11,6 +11,7 @@
   <link rel="stylesheet" href="./css/bootstrap.min.css">
   <link href="css/main.css" rel="stylesheet">
   <link href="css/custom.css" rel="stylesheet">
+  <script src="https://cdnjs.cloudflare.com/ajax/libs/xlsx/0.15.3/xlsx.full.min.js"></script>
   <script src="https://kit.fontawesome.com/79b3e255a2.js" crossorigin="anonymous"></script>
   <link rel="shortcut icon" type="image/png" sizes="32x32" href="./imgs/icon.png">
 
@@ -152,13 +153,13 @@
       <h5>2020</h5>
       <li>
         Santhanavanich, T., Wuerstle, P., Silberer, J., Loidl, V., Rodrigues, P., and Coors, V.:
-        <a href="https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-143-2020">3D SAFE ROUTING NAVIGATION APPLICATION FOR
+        <a href="https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-143-2020 ">3D SAFE ROUTING NAVIGATION APPLICATION FOR
           PEDESTRIANS AND CYCLISTS BASED ON OPEN SOURCE TOOLS</a>, ISPRS Ann. Photogramm. Remote Sens. Spatial Inf.
         Sci., VI-4/W2-2020, 143–147, https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-143-2020 
       </li>
       <li>
         Schneider, S., Santhanavanich, T., Koukofikis, A., and Coors, V.:
-        <a href="https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-157-2020">EXPLORING SCHEMES FOR VISUALIZING URBAN
+        <a href="https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-157-2020 ">EXPLORING SCHEMES FOR VISUALIZING URBAN
           WIND FIELDS BASED ON CFD SIMULATIONS BY EMPLOYING OGC STANDARDS</a>, ISPRS Ann. Photogramm. Remote Sens.
         Spatial Inf. Sci., VI-4/W2-2020, 157–163, https://doi.org/10.5194/isprs-annals-VI-4-W2-2020-157-2020 
       </li>