diff --git a/DESCRIPTION b/DESCRIPTION
index 7f5f3467da3d6ba9b6da41da650f284670466493..6f0bcda0cb8c4782041aeec7ef7511ef72681902 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,7 +1,7 @@
 Package: airGR
 Type: Package
 Title: Suite of GR Hydrological Models for Precipitation-Runoff Modelling
-Version: 1.0.9.30
+Version: 1.0.9.31
 Date: 2017-09-05
 Authors@R: c(
   person("Laurent", "Coron", role = c("aut", "trl")),
diff --git a/man/Param_Sets_GR4J.Rd b/man/Param_Sets_GR4J.Rd
index 31870f75472c1fde3dc6260768ec05a5c2eafc59..5d3461d37959c3ed63d7b9657292e678e72b56d2 100644
--- a/man/Param_Sets_GR4J.Rd
+++ b/man/Param_Sets_GR4J.Rd
@@ -9,7 +9,7 @@
 \title{Generalist parameter sets for the GR4J model}
 
 
-\format{Compromise short-list containing
+\format{Data frame of parameters containing four numeric vectors
 \itemize{
   \item {GR4J X1} {production store capacity [mm]}
   \item {GR4J X2} {intercatchment exchange coefficient [mm/d]}
@@ -19,15 +19,15 @@
 
 
 \description{
-These parameter sets can be used for the grid-screening calibration procedure.
-Please NOTE that the given GR4J X4u variable does not correspond to the actual GR4J X4 parameter.
+These parameter sets can be used for the grid-screening calibration procedure (i.e. first step in \code{\link{Calibration_Michel}}).
+Please note that the given GR4J X4u variable does not correspond to the actual GR4J X4 parameter.
 As explained in Andréassian \emph{et al.} (2014; section 2.1), the given GR4J X4u value has to be adjusted (rescaled) using catchment area (S) [km2] as follows: {X4 = X4u * S^0.3}.
 Please, see the example below.
 }
 
 
 \seealso{
-  \code{\link{RunModel_GR4J}}, \code{\link{Calibration_Michel}}.
+  \code{\link{RunModel_GR4J}}, \code{\link{Calibration_Michel}}, \code{\link{CreateCalibOptions}}.
 }