diff --git a/string/doc/external_concepts.html b/string/doc/external_concepts.html
index 7a4a502..58b8309 100644
--- a/string/doc/external_concepts.html
+++ b/string/doc/external_concepts.html
@@ -31,7 +31,7 @@
                typedef <i>implementation defined </i> foo_type;</code><p  >The corresponding external concept is the ExternalFooConcept.</p><p  >A type <code>T</code> fullfills the ExternalFooConcept if these
             free-standing functions and type-generators exists:</p><code>void foo( const T&, int ); <br>
                 int bar( T& ); <br>
-             foo_type_of< T >::type;</code> <br> <br><hr size="1" ><h3  >Literature</h3><ul  ><li  > <a href="http://www.boost.org/more/generic_programming.html#type_generator" target="_self" >Type Generators</a> </li><li  > <a href="http://www.boost.org/more/generic_programming.html#concept" target="_self" >Concepts</a> </li><li  > <a href="http://www.sgi.com/tech/stl/stl_introduction.html" target="_self" >Concepts and SGI STL</a> </li></ul><hr size="1" ><p  >&copy; Thorsten Ottosen 2003-2004 (nesotto_AT_cs.auc.dk).
+             foo_type_of< T >::type;</code> <br> <br><hr size="1" ><h3  >Literature</h3><ul  ><li  > <a href="http://beta.boost.org/community/generic_programming.html#type_generator" target="_self" >Type Generators</a> </li><li  > <a href="http://beta.boost.org/community/generic_programming.html#concept" target="_self" >Concepts</a> </li><li  > <a href="http://www.sgi.com/tech/stl/stl_introduction.html" target="_self" >Concepts and SGI STL</a> </li></ul><hr size="1" ><p  >&copy; Thorsten Ottosen 2003-2004 (nesotto_AT_cs.auc.dk).
     Permission to copy, use, modify, sell and distribute this software is granted provided this copyright notice appears
      in all copies. This software is provided "as is" without express or implied warranty, and with no
          claim as to its suitability for any purpose.</p><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br></body></html>