@inproceedings{ICALP-1984-Willard,
	author        = "Dan E. Willard",
	booktitle     = "{Proceedings of the 11th Colloquium on Automata, Languages and Programming}",
	doi           = "10.1007/3-540-13345-3_48",
	isbn          = "3-540-13345-3",
	pages         = "514--526",
	publisher     = "{Springer-Verlag}",
	series        = "{Lecture Notes in Computer Science}",
	title         = "{Sampling Algorithms for Differential Batch Retrieval Problems}",
	volume        = 172,
	year          = 1984,
}