Pavel Makagonov Mikhail Alexandrov Empirical Formula for Testing Word Similarity and Its Application for Constructing a Word Frequency List. 425-432 2002 conf/cicling/2002 CICLing http://link.springer.de/link/service/series/0558/bibs/2276/22760425.htm db/conf/cicling/cicling2002.html#MakagonovA02