Wikipedia, Ogg, http://en.wikipedia.org/wiki/Ogg
Wikipedia, Xiph.org Foundation, http://en.wikipedia.org/wiki/Xiph.org_Foundation
Vorbis.com, Vorbis faq, http://www.vorbis.com/faq.psp#what
Angry Coffee, Ogg Vorbis, http://www.angrycoffee.com/tutorials/vorbis/
Doom9.net, Ogg Vorbis Audio & Ogg Media Streams, http://www.doom9.org/index.html?/ogg.htm
Doom9.net, Ogg Theora Information, http://forum.doom9.org/showthread.php?s=&threadid=77314
LinuxQuestions.org, Speex, http://wiki.linuxquestions.org/wiki/Speex
LinuxQuestions.org, Vorbis, http://wiki.linuxquestions.org/wiki/Vorbis
LinuxQuestions.org, Ogg, http://wiki.linuxquestions.org/wiki/Ogg