diff --git a/base/modules/psb_c_base_mat_mod.f90 b/base/modules/psb_c_base_mat_mod.f90
index b4eeddd3..52e1337c 100644
--- a/base/modules/psb_c_base_mat_mod.f90
+++ b/base/modules/psb_c_base_mat_mod.f90
@@ -38,7 +38,7 @@ module psb_c_base_mat_mod
 
 
   !> \namespace  psb_base_mod  \class  psb_c_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !! \extends psb_base_mat_mod::psb_base_sparse_mat
   !! The psb_c_base_sparse_mat type, extending psb_base_sparse_mat,
   !! defines a middle level  complex(psb_spk_) sparse matrix object.
   !! This class object itself does not have any additional members
@@ -115,8 +115,8 @@ module psb_c_base_mat_mod
   private :: c_base_cp_from, c_base_mv_from
   
   
-  !> \namespace  psb_base_mod  \class  psb_c_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !> \namespace  psb_base_mod  \class  psb_c_coo_sparse_mat
+  !! \extends psb_c_base_mat_mod::psb_c_base_sparse_mat
   !! 
   !! psb_c_coo_sparse_mat type and the related methods. This is the
   !! reference type for all the format transitions, copies and mv unless
diff --git a/base/modules/psb_d_base_mat_mod.f90 b/base/modules/psb_d_base_mat_mod.f90
index ae703050..22e14304 100644
--- a/base/modules/psb_d_base_mat_mod.f90
+++ b/base/modules/psb_d_base_mat_mod.f90
@@ -38,7 +38,7 @@ module psb_d_base_mat_mod
 
 
   !> \namespace  psb_base_mod  \class  psb_d_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !! \extends psb_base_mat_mod::psb_base_sparse_mat
   !! The psb_d_base_sparse_mat type, extending psb_base_sparse_mat,
   !! defines a middle level  real(psb_dpk_) sparse matrix object.
   !! This class object itself does not have any additional members
@@ -115,8 +115,8 @@ module psb_d_base_mat_mod
   private :: d_base_cp_from, d_base_mv_from
   
   
-  !> \namespace  psb_base_mod  \class  psb_d_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !> \namespace  psb_base_mod  \class  psb_d_coo_sparse_mat
+  !! \extends psb_d_base_mat_mod::psb_d_base_sparse_mat
   !! 
   !! psb_d_coo_sparse_mat type and the related methods. This is the
   !! reference type for all the format transitions, copies and mv unless
diff --git a/base/modules/psb_s_base_mat_mod.f90 b/base/modules/psb_s_base_mat_mod.f90
index 4b1391e4..91cb042d 100644
--- a/base/modules/psb_s_base_mat_mod.f90
+++ b/base/modules/psb_s_base_mat_mod.f90
@@ -38,7 +38,7 @@ module psb_s_base_mat_mod
 
 
   !> \namespace  psb_base_mod  \class  psb_s_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !! \extends psb_base_mat_mod::psb_base_sparse_mat
   !! The psb_s_base_sparse_mat type, extending psb_base_sparse_mat,
   !! defines a middle level  real(psb_spk_) sparse matrix object.
   !! This class object itself does not have any additional members
@@ -115,8 +115,8 @@ module psb_s_base_mat_mod
   private :: s_base_cp_from, s_base_mv_from
   
   
-  !> \namespace  psb_base_mod  \class  psb_s_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !> \namespace  psb_base_mod  \class  psb_s_coo_sparse_mat
+  !! \extends psb_s_base_mat_mod::psb_s_base_sparse_mat
   !! 
   !! psb_s_coo_sparse_mat type and the related methods. This is the
   !! reference type for all the format transitions, copies and mv unless
diff --git a/base/modules/psb_z_base_mat_mod.f90 b/base/modules/psb_z_base_mat_mod.f90
index 0f28b704..93f771e1 100644
--- a/base/modules/psb_z_base_mat_mod.f90
+++ b/base/modules/psb_z_base_mat_mod.f90
@@ -38,7 +38,7 @@ module psb_z_base_mat_mod
 
 
   !> \namespace  psb_base_mod  \class  psb_z_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !! \extends psb_base_mat_mod::psb_base_sparse_mat
   !! The psb_z_base_sparse_mat type, extending psb_base_sparse_mat,
   !! defines a middle level  complex(psb_dpk_) sparse matrix object.
   !! This class object itself does not have any additional members
@@ -115,8 +115,8 @@ module psb_z_base_mat_mod
   private :: z_base_cp_from, z_base_mv_from
   
   
-  !> \namespace  psb_base_mod  \class  psb_z_base_sparse_mat
-  !! \extends psb_base_mod::psb_base_sparse_mat
+  !> \namespace  psb_base_mod  \class  psb_z_coo_sparse_mat
+  !! \extends psb_z_base_mat_mod::psb_z_base_sparse_mat
   !! 
   !! psb_z_coo_sparse_mat type and the related methods. This is the
   !! reference type for all the format transitions, copies and mv unless