diff --git a/src/site/markdown/tutorials/direct-location-with-DEM.md b/src/site/markdown/tutorials/direct-location-with-DEM.md
index dfc9014562d6445424cdc80887ab0dfce45a9fe5..6d33ef00936f7212600837cef8909a4a706227e4 100644
--- a/src/site/markdown/tutorials/direct-location-with-DEM.md
+++ b/src/site/markdown/tutorials/direct-location-with-DEM.md
@@ -29,7 +29,7 @@ The calling application must implement the callback function for loading the til
  
 ### Implementing the interface TileUpdater for DEM loading. 
 
-In this tutorial, we will not include real DEM data. Instead we are going to create a fake DEM representing a volcanoe in a form of a perfect cone, similar to the Mayon volcano in the Philippines, except that we will locate it somewhere just below our satellite. This example is already part of Rugged tests cases, the source code is available in the package `org.orekit.rugged.raster`, file VolcanicConeElevationUpdater.java. 
+In this tutorial, we will not include real DEM data. Instead we are going to create a fake DEM representing a volcano in a form of a perfect cone, similar to the Mayon volcano in the Philippines, except that we will locate it somewhere just below our satellite. This example is already part of Rugged tests cases, the source code is available in the package `org.orekit.rugged.raster`, file VolcanicConeElevationUpdater.java. 
 
 The class `VolcanicConeElevationUpdater` implements the interface `TileUpdater` with its method `updateTile`. The method is in charge of loading a tile. The extent of the tile must be such that it covers at least the ground point with coordinates (latitude, longitude) which are passed as arguments to the method. The tile is an object of type `UpdatableTile` which has two methods :
 
@@ -169,4 +169,4 @@ In a similar way as in the first tutorial [DirectLocation](./direct-location.htm
     }
 
 ## Source code
-The source code is available in DirectLocationGrid.java
+The source code is available in DirectLocationWithDEM.java
diff --git a/src/site/markdown/tutorials/inverse-location.md b/src/site/markdown/tutorials/inverse-location.md
index 6cce44a6a2eac2b2f24581e6182e1f75281ac33c..bf455331b0cdcfaa8384cf6bd651a7bf82f79c58 100644
--- a/src/site/markdown/tutorials/inverse-location.md
+++ b/src/site/markdown/tutorials/inverse-location.md
@@ -51,4 +51,4 @@ Similarly, for a point defined solely by its latitude en longitude (altitude det
      AbsoluteDate dateLine = rugged.dateLocation(sensorName, latitude, longitude, minLine, maxLine);
 
 ## Source code
-The source code is available in InverseLocTutorial.java 
+The source code is available in InverseLocation.java