diff --git a/man/Rcpp_corrData-class.Rd b/man/Rcpp_corrData-class.Rd
index d57f665..ea6723a 100644
--- a/man/Rcpp_corrData-class.Rd
+++ b/man/Rcpp_corrData-class.Rd
@@ -7,22 +7,19 @@
 \description{
 This C++ class could be used to build a corrData object by invoking \code{new(corrData,...)} function.
 }
-\section{Extends}{
-Class \code{"\linkS4class{C++Object}"}, directly.
 
-All reference classes extend and inherit methods from \code{"\linkS4class{envRefClass}"}.
-
-}
 \references{
 See the documentation for RcppArmadillo and Rcpp for more details of how this class was built.
+\url{https://cran.r-project.org/web/packages/Rcpp/vignettes/Rcpp-modules.pdf}
 }
 
 \note{
 This is only frame for building C++ object which could be used to implement certain methods.
 Check the vignette for more details of implementing methods.
-}
 
-%% ~Make other sections like Warning with \section{Warning }{....} ~
+Vigniette:
+\url{https://CRAN.R-project.org/package=miceFast}
+}
 
 \examples{
 #showClass("Rcpp_corrData")
diff --git a/man/Rcpp_miceFast-class.Rd b/man/Rcpp_miceFast-class.Rd
index c5434fb..e24c7c5 100644
--- a/man/Rcpp_miceFast-class.Rd
+++ b/man/Rcpp_miceFast-class.Rd
@@ -8,14 +8,10 @@
 \description{
 This C++ class could be used to build a miceFast objects by invoking \code{new(miceFast)} function.
 }
-\section{Extends}{
-Class \code{"\linkS4class{C++Object}"}, directly.
 
-All reference classes extend and inherit methods from \code{"\linkS4class{envRefClass}"}.
-
-}
 \references{
 See the documentation for RcppArmadillo and Rcpp for more details of how this class was built.
+\url{https://cran.r-project.org/web/packages/Rcpp/vignettes/Rcpp-modules.pdf}
 }
 
 \note{
@@ -26,7 +22,6 @@ Vigniette:
 \url{https://CRAN.R-project.org/package=miceFast}
 }
 
-%% ~Make other sections like Warning with \section{Warning }{....} ~
 
 \examples{
 #showClass("Rcpp_miceFast")
diff --git a/man/VIF.Rd b/man/VIF.Rd
index 555e49f..91ec355 100644
--- a/man/VIF.Rd
+++ b/man/VIF.Rd
@@ -44,7 +44,7 @@ Usually values higher than 10 (around), mean a collinearity problem.
 
 }}
 \note{
-vif_corrected = vif_basic^{(1/(2*df))}
+vif_corrected = vif_basic^(1/(2*df))
 }
 \examples{
 \dontrun{