diff --git a/src/main/java/org/orekit/rugged/api/Rugged.java b/src/main/java/org/orekit/rugged/api/Rugged.java
index fdddf72280ece658ef7b000f86bf75349c5dd7f2..2b0bef298a42497a73e03821485b75c5333b231a 100644
--- a/src/main/java/org/orekit/rugged/api/Rugged.java
+++ b/src/main/java/org/orekit/rugged/api/Rugged.java
@@ -747,9 +747,9 @@ public class Rugged {
      * LineSensor#getParametersDrivers() getParametersDrivers()}
      * method on the desired sensors must be configured. The parameters that should
      * be estimated must have their {@link ParameterDriver#setSelected(boolean)
-     * selection status} set to {@link true} whereas the parameters that should retain
+     * selection status} set to {@code true} whereas the parameters that should retain
      * their current value must have their {@link ParameterDriver#setSelected(boolean)
-     * selection status} set to {@link false}. If needed, the {@link
+     * selection status} set to {@code false}. If needed, the {@link
      * ParameterDriver#setValue(double) value} of the estimated/selected parameters
      * can also be changed before calling the method, as this value will serve as the
      * initial value in the estimation process.
diff --git a/src/main/java/org/orekit/rugged/los/TimeIndependentLOSTransform.java b/src/main/java/org/orekit/rugged/los/TimeIndependentLOSTransform.java
index 17b16449a17bcfe76c9465f2e0bd9c57cad97d8d..f9e52a99cc3e633e816ac1f58d8536a33600e0c9 100644
--- a/src/main/java/org/orekit/rugged/los/TimeIndependentLOSTransform.java
+++ b/src/main/java/org/orekit/rugged/los/TimeIndependentLOSTransform.java
@@ -46,11 +46,9 @@ public interface TimeIndependentLOSTransform {
      * </p>
      * <p>
      * Note that in order for the partial derivatives to be properly set up, the
-     * {@link #setEstimatedParameters(double[], int, int) setEstimatedParameters}
-     * <em>must</em> have been called at least once before this method and its
-     * {@code start} parameter will be used to ensure the partial derivatives are
-     * ordered in the same way in the returned vector as they were in the set
-     * parameters.
+     * {@link org.orekit.utils.ParameterDriver#setSelected(boolean) setSelected}
+     * method must have been set to {@code true} for the various parameters returned
+     * by {@link #getParametersDrivers()} that should be estimated.
      * </p>
      * @param index los pixel index
      * @param los line-of-sight to transform