Added a hyperlink from sequence types to mutable sequence types.
diff --git a/Doc/library/stdtypes.rst b/Doc/library/stdtypes.rst
index 5ec8dbd..de0a780 100644
--- a/Doc/library/stdtypes.rst
+++ b/Doc/library/stdtypes.rst
@@ -562,7 +562,7 @@
Most sequence types support the following operations. The ``in`` and ``not in``
operations have the same priorities as the comparison operations. The ``+`` and
``*`` operations have the same priority as the corresponding numeric operations.
-[#]_
+[#]_ Additional methods are provided for :ref:`typesseq-mutable`.
This table lists the sequence operations sorted in ascending priority
(operations in the same box have the same priority). In the table, *s* and *t*