@book{harris68mathlanguage,
	title = {Mathematical Structures of Language},
	address = {New York, NY, USA},
	author = {Z.S. Harris},
	publisher = {Wiley},
	year = {1968},
	biburl = {http://www.bibsonomy.org/bibtex/28fe0ee87c2a7d4fcb09df94bc3f28ba1/sb3000},
	keywords = {linguistics nlp similarity }
}