@inproceedings{SOSP-1973-PopekG,
	author        = "Gerald J. Popek and Robert P. Goldberg",
	booktitle     = "{Proceedings of the Fourth Symposium on Operating System Principles}",
	doi           = "10.1145/800009.808061",
	pages         = "121",
	publisher     = "{ACM}",
	title         = "{Formal Requirements for Virtualizable Third Generation Architectures}",
	year          = 1973,
}