@inproceedings{POPL-1980-KapurM,
	author        = "Deepak Kapur and Mandayam K. Srivas",
	booktitle     = "{Conference Record of the Seventh Annual Symposium on Principles of Programming Languages}",
	doi           = "10.1145/567446.567460",
	editor        = "Paul W. Abrahams and Richard J. Lipton and Stephen R. Bourne",
	isbn          = "0-89791-011-7",
	pages         = "139--153",
	publisher     = "{ACM Press}",
	title         = "{Expressiveness of the Operation Set of a Data Abstraction}",
	year          = 1980,
}