@inproceedings{CIAA-2013-IbarraR,
	author        = "Oscar H. Ibarra and Bala Ravikumar",
	booktitle     = "{Proceedings of the 18th International Conference on Implementation and Application of Automata}",
	doi           = "10.1007/978-3-642-39274-0_18",
	isbn          = "978-3-642-39273-3",
	pages         = "193--207",
	publisher     = "{Springer International Publishing}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Some Decision Problems Concerning NPDAs, Palindromes, and Dyck Languages}",
	volume        = 7982,
	year          = 2013,
}