@inproceedings{POPL-1988-Cardelli,
	author        = "Luca Cardelli",
	booktitle     = "{Conference Record of the 15th Annual Symposium on Principles of Programming Languages}",
	doi           = "10.1145/73560.73566",
	editor        = "Jeanne Ferrante and P. Mager",
	isbn          = "0-89791-252-7",
	pages         = "70--79",
	publisher     = "{ACM Press}",
	title         = "{Structural Subtyping and the Notion of Power Type}",
	year          = 1988,
}