@inproceedings{ICALP-1976-Lipski,
	author        = "Witold Lipski Jr.",
	booktitle     = "{Proceedings of the Third International Colloquium on Automata, Languages and Programming}",
	isbn          = "0-85224-308-1",
	pages         = "120--130",
	title         = "{Informational Systems with Incomplete Information}",
	year          = 1976,
}