@inproceedings{AS-1989-Hoare,
	author        = "C. A. R. Hoare",
	booktitle     = "{Proceedings of the Third International Joint Conference on Theory and Practice of Software Development, Volume 1: Advanced Seminar on Foundations of Innovative Software Development}",
	doi           = "10.1007/3-540-50939-9_121",
	isbn          = "3-540-50939-9",
	pages         = "1--18",
	publisher     = "{Springer}",
	title         = "{The Varieties of Programming Language}",
	year          = 1989,
}