@inproceedings{SIGMOD-1981-StearnsR,
	author        = "Richard Edwin Stearns and Daniel J. Rosenkrantz",
	booktitle     = "{Proceedings of the 11th ACM SIGMOD International Conference on Management of Data}",
	cdrom         = "SIGMOD81/P074.PDF",
	doi           = "10.1145/582318.582330",
	pages         = "74--83",
	publisher     = "{ACM Press}",
	title         = "{Distributed Database Concurrency Controls Using Before-Values}",
	year          = 1981,
}