.. _Comedi: http://www.comedi.org/
.. _layman: http://layman.sourceforge.net/
-.. _wtk overlay: http://blog.tremily.us/posts/Gentoo_overlay
+.. _wtk overlay: http://blog.tremily.us/posts/Gentoo_overlay/
.. _science overlay: http://overlays.gentoo.org/proj/science/wiki/en
.. _Debian: http://www.debian.org/
.. _Gentoo: http://www.gentoo.org/