@inproceedings{POPL-1977-BerryL,
	author        = "Gérard Berry and Jean-Jacques Lévy",
	booktitle     = "{Conference Record of the Fourth Symposium on Principles of Programming Languages}",
	cdrom         = "POPL/00001445.PDF",
	doi           = "10.1145/512950.512971",
	editor        = "Robert M. Graham and Michael A. Harrison and Ravi Sethi",
	pages         = "215--226",
	publisher     = "{ACM}",
	title         = "{Minimal and Optimal Computations of Recursive Programs}",
	year          = 1977,
}