@article{ICLP-J-2011-GebserKS,
	author        = "Martin Gebser and Roland Kaminski and Torsten Schaub",
	doi           = "10.1017/S1471068411000329",
	journal       = "{Theory and Practice of Logic Programming}",
	number        = "4-5",
	pages         = "821--839",
	title         = "{Complex optimization in answer set programming}",
	volume        = 11,
	year          = 2011,
}