@inproceedings{POPL-1975-CookO,
	author        = "Stephen A. Cook and Derek C. Oppen",
	booktitle     = "{Conference Record of the Second Symposium on Principles of Programming Languages}",
	doi           = "10.1145/512976.512993",
	editor        = "Robert M. Graham and Michael A. Harrison and John C. Reynolds",
	pages         = "160--166",
	publisher     = "{ACM Press}",
	title         = "{An Assertion Language for Data Structures}",
	year          = 1975,
}