@inproceedings{STOC-2002-ElkinK,
	author        = "Michael Elkin and Guy Kortsarz",
	booktitle     = "{Proceedings of the 34th Annual ACM Symposium on Theory of Computing}",
	doi           = "10.1145/509907.509972",
	isbn          = "1-58113-495-9",
	pages         = "438--447",
	publisher     = "{ACM}",
	title         = "{Combinatorial logarithmic approximation algorithm for directed telephone broadcast problem}",
	year          = 2002,
}