@inproceedings{POPL-1983-DemersD,
	author        = "Alan J. Demers and James E. Donahue",
	booktitle     = "{Conference Record of the 10th Annual Symposium on Principles of Programming Languages}",
	doi           = "10.1145/567067.567075",
	editor        = "John R. Wright and Larry Landweber and Alan J. Demers and Tim Teitelbaum",
	isbn          = "0-89791-090-7",
	pages         = "59--72",
	publisher     = "{ACM Press}",
	title         = "{Making Variables Abstract: An Equational Theory for Russell}",
	year          = 1983,
}