@inproceedings{STOC-1979-GilbertLT,
	author        = "John R. Gilbert and Thomas Lengauer and Robert Endre Tarjan",
	booktitle     = "{Proceedings of the 11th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/800135.804418",
	pages         = "237--248",
	publisher     = "{ACM}",
	title         = "{The Pebbling Problem is Complete in Polynomial Space}",
	year          = 1979,
}