@inproceedings{POPL-2001-Gil,
	author        = "Joseph Yossi Gil",
	booktitle     = "{Conference Record of the 28th Symposium on Principles of Programming Languages}",
	doi           = "10.1145/360204.360232",
	editor        = "Chris Hankin and Dave Schmidt",
	isbn          = "1-58113-336-7",
	pages         = "276--289",
	publisher     = "{ACM}",
	title         = "{Subtyping arithmetical types}",
	year          = 2001,
}