@article {DBLP:journals/toplas/BrogiMPT94,
	title = {Modular Logic Programming},
	journal = {ACM Trans. Program. Lang. Syst.},
	volume = {16},
	number = {4},
	year = {1994},
	pages = {1361-1398},
	author = {Antonio Brogi and Paolo Mancarella and Dino Pedreschi and Franco Turini}
}
