@inproceedings{POPL-1997-Sands,
	author        = "David Sands",
	booktitle     = "{Conference Record of the 24th Symposium on Principles of Programming Languages}",
	doi           = "10.1145/263699.263760",
	editor        = "Peter Lee and Fritz Henglein and Neil D. Jones",
	isbn          = "0-89791-853-3",
	pages         = "428--441",
	publisher     = "{ACM Press}",
	title         = "{From SOS Rules to Proof Principles: An Operational Metatheory for Functional Languages}",
	year          = 1997,
}