@inproceedings{POPL-1983-Leivant83a,
	author        = "Daniel Leivant",
	booktitle     = "{Conference Record of the 10th Annual Symposium on Principles of Programming Languages}",
	doi           = "10.1145/567067.567083",
	editor        = "John R. Wright and Larry Landweber and Alan J. Demers and Tim Teitelbaum",
	isbn          = "0-89791-090-7",
	pages         = "155--166",
	publisher     = "{ACM Press}",
	title         = "{Structural Semantics for Polymorphic Data Types}",
	year          = 1983,
}