diff --git a/c++/app4triqs/toto.hpp b/c++/app4triqs/toto.hpp
index 024d619c..ee3b05ef 100644
--- a/c++/app4triqs/toto.hpp
+++ b/c++/app4triqs/toto.hpp
@@ -62,7 +62,9 @@ namespace app4triqs {
   /**
    * Chain digits of two integers
    *
-   * Chain the decimal digits of two integers i and j, and return the result
+   * @head A set of functions that implement chaining
+   *
+   * @tail Do I really need to explain more ? 
    *
    * @param i The first integer
    * @param j The second integer
@@ -71,5 +73,26 @@ namespace app4triqs {
    * @remark
    */
   int chain(int i, int j);
+ 
+  /**
+   * Chain digits of three integers
+   *
+   * @param i The first integer
+   * @param j The second integer
+   * @param k The third integer
+   * @return An integer containing the digits of both i and j
+   *
+   * @remark
+   */
+  int chain(int i, int j, int k);
+
+  /**
+   * Chain digits of one integers
+   *
+   * @param i The first integer
+   *
+   * @remark
+   */
+  int chain(int i);
 
 } // namespace app4triqs
diff --git a/doc/contents.rst b/doc/contents.rst
index 2cd84574..b6e57375 100644
--- a/doc/contents.rst
+++ b/doc/contents.rst
@@ -10,3 +10,17 @@ Table of contents
    issues
    about
 
+Python
+------
+
+.. automodule:: app4triqs 
+   :members:
+
+Reference manual
+----------------
+
+.. toctree::
+   :maxdepth: 1
+
+   cpp2rst_generated/app4triqs/toto
+   cpp2rst_generated/app4triqs/chain