1. Church, K.W., Hanks, P.: Word Association Norms, Mutual Information and Lexicography. In: Proceedings of the 27th Annual Conference of the Association of Computational Linguistics, (1989) 76–83.
2. Church, K.W., Gale, W., Hanks, P., Hindle, D.: Using Statistics in Lexical Analysis. In: Uri Zernik (ed.), Lexical Acquisition: Exploiting On-Line Resources to Build a Lexicon. New Jersey: Lawrence Erlbaum (1991) 115–164.
3. Alta Vista, Alta Vista Company, Palo Alto, California,
http://www.altavista.com/
.
4. Test of English as a Foreign Language (TOEFL), Educational Testing Service, Princeton, New Jersey,
http://www.ets.org/
.
5. Tatsuki, D.: Basic 2000 Words-Synonym Match 1. In: Interactive JavaScript Quizzes for ESL Students,
http://www.aitech.ac.jp/~iteslj/quizzes/js/dt/mc-2000-01syn.html
(1998).