@inproceedings{FoSSaCS-2014-Jancar,
	author        = "Petr Jancar",
	booktitle     = "{Proceedings of the 17th International Conference on Foundations of Software Science and Computation Structures}",
	doi           = "10.1007/978-3-642-54830-7_1",
	isbn          = "978-3-642-54829-1",
	pages         = "1--28",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Equivalences of Pushdown Systems Are Hard}",
	volume        = 8412,
	year          = 2014,
}