diff --git a/Modelica/Thermal/HeatTransfer/UsersGuide/References.mo b/Modelica/Thermal/HeatTransfer/UsersGuide/References.mo
index 0fb5e99f66..b9acf7518f 100644
--- a/Modelica/Thermal/HeatTransfer/UsersGuide/References.mo
+++ b/Modelica/Thermal/HeatTransfer/UsersGuide/References.mo
@@ -7,12 +7,12 @@ class References "References"
 
   <tr>
     <td>[<a href=\"https://www.hanser-elibrary.com/isbn/9783446452183\">Fischer2017</a>]</td>
-    <td>R. Fischer, <em>Elektrische Maschinen</em> (in German), 17th edition, Hanser-Verlag, 2017</td>
+    <td>Rolf Fischer, <em>Elektrische Maschinen</em> (in German), 17th edition, Hanser-Verlag, 2017</td>
   </tr>
 
   <tr>
-    <td>[<a href=\"https://www.academia.edu/6340170/Heat_Transfer_J_P_Holman_Ed_10\">Holman2010</a>]</td>
-    <td>J. P. Holman, <em>Heat Transfer</em>, 10th edition, McGraw-Hill, 2010</td>
+    <td>[<a href=\"https://ia800803.us.archive.org/1/items/JackP.HolmanHeatTransferTenthEdition/%5BJack_P._Holman%5D_Heat_Transfer%2C_Tenth_Edition.pdf\">Holman2010</a>]</td>
+    <td>Jack P. Holman, <em>Heat Transfer</em>, 10th edition, McGraw-Hill, 2010</td>
   </tr>
   <tr>
     <td>[<a href=\"https://www.springer.com/us/book/9780792373674\">Tiller2001</a>]</td>