diff --git a/NumLib/Extrapolation/ExtrapolatableElementCollection.h b/NumLib/Extrapolation/ExtrapolatableElementCollection.h
index ab47613cad507e716182f93d212450cd5a85341c..e2d861360e913ed59e0bb9ad7b2e52e1b6ade995 100644
--- a/NumLib/Extrapolation/ExtrapolatableElementCollection.h
+++ b/NumLib/Extrapolation/ExtrapolatableElementCollection.h
@@ -37,6 +37,11 @@ public:
     /*! Returns integration point values of some property of a specific element.
      *
      * \param id ID of the element of which the property is queried.
+     * \param t The time used in the evaluation if time dependent quantities.
+     * \param current_solution The current solution of a ProcessLib::Process;
+     * more generally any nodal GlobalVector.
+     * \param dof_table The processes d.o.f. table used to get each element's
+     * local d.o.f. from \c current_solution.
      * \param cache Can be used to compute a property on-the-fly.
      *
      * \remark
diff --git a/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.h b/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.h
index f1cbb79f266c7ef8ee355496cc4459ff62430be1..11727b25e1d25ae60b1348ed85802c80cbe4b052 100644
--- a/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.h
+++ b/NumLib/Extrapolation/LocalLinearLeastSquaresExtrapolator.h
@@ -28,12 +28,10 @@ namespace NumLib
  * the residuals are computed from the actual interpolation result that is being
  * returned by this class.
  *
- * Currently this class only supports interpolating single component variables.
- *
- * Furthermore, the number of integration points in each element must be greater
- * than or equal to the number of nodes of that element. This restriction is due to
- * the use of the least squares which requires an exact or overdetermined equation
- * system.
+ * The number of integration points in each element must be greater than or
+ * equal to the number of nodes of that element. This restriction is due
+ * to the use of the least squares which requires an exact or overdetermined
+ * equation system.
  * \endparblock
  */
 class LocalLinearLeastSquaresExtrapolator : public Extrapolator
@@ -114,12 +112,12 @@ private:
         Eigen::MatrixXd A_pinv;
     };
 
-    /*! Maps (#nodes, #int_pts) to (N_0, QR decomposition),
+    /*! Maps (\#nodes, \#int_pts) to (N_0, QR decomposition),
      * where N_0 is the shape matrix of the first integration point.
      *
-     * \note It is assumed that the pair (#nodes, #int_pts) uniquely identifies
-     * the set of all shape matrices N for a mesh element (i.e., only N, not
-     * dN/dx etc.).
+     * \note It is assumed that the pair (\#nodes, \#int_pts) uniquely
+     * identifies the set of all shape matrices N for a mesh element (i.e., only
+     * N, not dN/dx etc.).
      *
      * \todo Add the element dimension as identifying criterion, or change to
      * typeid.