@article{ICLP-J-2013-AlvianoP,
	author        = "Mario Alviano and Rafael Peñaloza",
	doi           = "10.1017/S1471068413000471",
	journal       = "{Theory and Practice of Logic Programming}",
	number        = "4-5",
	pages         = "753--767",
	title         = "{Fuzzy answer sets approximations}",
	volume        = 13,
	year          = 2013,
}