David Raggett; Michael K. Brown; Andreas Kellner. <a href="http://www.w3.org/TR/2001/WD-ngram-spec-20010103"><cite>Stochastic Language Models (N-Gram) Specification.</cite></a> 3 January 2001. W3C Working Draft. (Work in progress.) URL: <a href="http://www.w3.org/TR/2001/WD-ngram-spec-20010103">http://www.w3.org/TR/2001/WD-ngram-spec-20010103</a>