@phdthesis{freej1991c,
	Author = {Freek Wiedijk},
	Date-Added = {2014-11-15 22:16:19 +0000},
	Date-Modified = {2014-11-15 22:17:39 +0000},
	School = {University of Amsterdam},
	Title = {Persistence in Algebraic Specifications},
	Url_Pdf = {http://www.cs.ru.nl/F.Wiedijk/perspect/perspect.pdf},
	Year = {1991}}

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