@article{Sankoff72,
	title = {Matching sequences under deletion-insertion constraints},
	author = {David Sankoff},
	journal = {Proceedings of the Natural Academy of Sciences of the U.S.A.},
	pages = {4--6},
	volume = {69},
	year = {1972},
	biburl = {http://www.bibsonomy.org/bibtex/2d5c7761f0eb8d1a9d592c10b7857addd/nlp},
	keywords = {2000 book nlp }
}