@article{ICLP-J-2011-RiguzziS,
	author        = "Fabrizio Riguzzi and Terrance Swift",
	doi           = "10.1017/S147106841100010X",
	journal       = "{Theory and Practice of Logic Programming}",
	number        = "4-5",
	pages         = "433--449",
	title         = "{The PITA system: Tabling and answer subsumption for reasoning under uncertainty}",
	volume        = 11,
	year          = 2011,
}