@inproceedings{ICALP-1982-Lingas,
	author        = "Andrzej Lingas",
	booktitle     = "{Proceedings of the Ninth Colloquium on Automata, Languages and Programming}",
	doi           = "10.1007/BFb0012784",
	isbn          = "3-540-11576-5",
	pages         = "369--383",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{The Power of Non-Rectilinear Holes}",
	volume        = 140,
	year          = 1982,
}