diff --git a/doc/CFDEMcoupling_about.txt b/doc/CFDEMcoupling_about.txt
index bf2ff476..e99b4862 100644
--- a/doc/CFDEMcoupling_about.txt
+++ b/doc/CFDEMcoupling_about.txt
@@ -45,10 +45,11 @@ Method (DEM) coupling.
 CFDEMcoupling is an open-source code, distributed freely under the terms of the
 "GNU Public License (GPL)"_https://www.gnu.org/licenses/gpl-3.0.en.html.
 
-Core development of CFDEMcoupling is done by Christoph Goniva and Christoph
-Kloss, both at DCS Computing GmbH, 2012
+Core development of the public version of CFDEMcoupling is done by Christoph
+Goniva and Christoph Kloss, both at DCS Computing GmbH.
 
-This documentation was written by Christoph Goniva, DCS Computing GmbH, 2012
+The original version of this documentation was written by Christoph Goniva, DCS
+Computing GmbH, 2012.
 
 :line
 
diff --git a/doc/IOModel_noIO.txt b/doc/IOModel_noIO.txt
index 4122149f..92c47159 100644
--- a/doc/IOModel_noIO.txt
+++ b/doc/IOModel_noIO.txt
@@ -20,7 +20,7 @@ IOModel off; :pre
 
 [Description:]
 
-The noIO-model is a dummy IO model.
+This IOModel produces no output.
 
 [Restrictions:]
 
diff --git a/doc/cfdemSolverIB.txt b/doc/cfdemSolverIB.txt
index 89946232..fe5a3a82 100644
--- a/doc/cfdemSolverIB.txt
+++ b/doc/cfdemSolverIB.txt
@@ -18,7 +18,7 @@ the governing equations of the fluid are computed and the corrections of
 velocity and pressure field with respect to the body-movement information,
 gained from LIGGGHTS, are incorporated.
 
-Code of this solver contributions by Alice Hager, JKU.
+The code of this solver was contributed by Alice Hager, JKU.
 
 [Algorithm:]
 
@@ -55,7 +55,6 @@ designed for the present case:
 
 GONIVA, C., KLOSS, C., HAGER,A., WIERINK, G. and PIRKER, S. (2011): "A MULTI-PURPOSE OPEN SOURCE CFD-DEM APPROACH", Proc. of the 8th Int. Conf. on CFD in Oil and Gas, Metallurgical and Process Industries, Trondheim, Norway
 
-and
 
 HAGER, A., KLOSS, C. and GONIVA, C. (2011): "TOWARDS AN EFFICIENT IMMERSED BOUNDARY METHOD WITHIN AN OPEN SOURCE FRAMEWORK", Proc. of the 8th Int. Conf. on CFD in Oil and Gas, Metallurgical and Process Industries, Trondheim, Norway
 NOTE:
diff --git a/doc/clockModel.txt b/doc/clockModel.txt
index 3b77afb0..370cb59d 100644
--- a/doc/clockModel.txt
+++ b/doc/clockModel.txt
@@ -28,7 +28,7 @@ models in this documentation.
 The clockModel is the base class for models to examine the code/algorithm with
 respect to run time.
 
-Main parts of the clockModel classes are written by Josef Kerbl, JKU.
+Main parts of the clockModel classes were written by Josef Kerbl, JKU.
 
 [Restrictions:]
 
diff --git a/doc/probeModel_noProbe.txt b/doc/probeModel_noProbe.txt
index ed0d0cbd..0b806f8d 100644
--- a/doc/probeModel_noProbe.txt
+++ b/doc/probeModel_noProbe.txt
@@ -23,7 +23,7 @@ of models that can perform particle probing.
 
 [Description:]
 
-Does not perform any probing.
+This model does not perform any probing.
 
 [Restrictions:]
 
diff --git a/doc/voidFractionModel_IBVoidFraction.txt b/doc/voidFractionModel_IBVoidFraction.txt
index d732488a..56f3bac1 100644
--- a/doc/voidFractionModel_IBVoidFraction.txt
+++ b/doc/voidFractionModel_IBVoidFraction.txt
@@ -50,7 +50,7 @@ The region of influence of a particle can be increased artificially by
 "scaleUpVol", which blows up the particles, but keeps their volume (for
 voidfraction calculation) constant.
 
-Code of this sub-model contributed by Alice Hager, JKU.
+Code of this sub-model was contributed by Alice Hager, JKU.
 
 [Restrictions:]
 
diff --git a/doc/voidFractionModel_bigParticleVoidFraction.txt b/doc/voidFractionModel_bigParticleVoidFraction.txt
index 37e5490b..495d1714 100644
--- a/doc/voidFractionModel_bigParticleVoidFraction.txt
+++ b/doc/voidFractionModel_bigParticleVoidFraction.txt
@@ -54,7 +54,7 @@ voidfraction calculation) constant.
 The particle volume occupied in the CFD domain can be adjusted by the parameter
 "weight", using Vparticle=dsphere^3*pi/6*weight.
 
-Parts of this sub-model contributed by Alice Hager, JKU.
+Parts of this sub-model were contributed by Alice Hager, JKU.
 
 [Restrictions:]