@conference {DBLP:conf/deductive/CorciuloGPZ94,
	title = {Expressive Power of Non-Deterministic Operators for Logic-based Languages},
	booktitle = {Workshop on Deductive Databases and Logic Programming},
	year = {1994},
	pages = {27-40},
	author = {Luca Corciulo and Fosca Giannotti and Dino Pedreschi and Carlo Zaniolo}
}
@conference {DBLP:conf/dood/CorciuloGP93,
	title = {Datalog with Non-Deterministic Choice Computes NDB-PTIME},
	booktitle = {DOOD},
	year = {1993},
	pages = {49-66},
	author = {Luca Corciulo and Fosca Giannotti and Dino Pedreschi}
}
