@inproceedings{POPL-1999-XiP,
	author        = "Hongwei Xi and Frank Pfenning",
	booktitle     = "{Proceedings of the 26th Symposium on Principles of Programming Languages}",
	doi           = "10.1145/292540.292560",
	editor        = "Andrew W. Appel and Alex Aiken",
	isbn          = "1-58113-095-3",
	pages         = "214--227",
	publisher     = "{ACM}",
	title         = "{Dependent Types in Practical Programming}",
	year          = 1999,
}