==========
References
==========

.. [PythonIssue3080] see `<http://bugs.python.org/issue3080>`_ The work seems finished with Python 3.3.
.. [HTML4.01Appendix_B2] see `<http://www.w3.org/TR/1999/REC-html401-19991224/appendix/notes.html#h-B.2>`_
.. [HTML5URL] see `<http://www.w3.org/TR/html5/infrastructure.html#urls>`_ . But the specification seems to request the encoding of the caller HTML should be utf-8 or utf-16.