@inproceedings{AS-1987-Thatcher,
	author        = "James W. Thatcher",
	booktitle     = "{Proceedings of the Second International Joint Conference on Theory and Practice of Software Development, Volume 1: Advanced Seminar on Foundations of Innovative Software Development}",
	doi           = "10.1007/3-540-17660-8_63",
	isbn          = "3-540-17660-8",
	pages         = "287",
	publisher     = "{Springer}",
	title         = "{Algebraic Semantics}",
	year          = 1987,
}