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Dyfyniad Arddull ChicagoLeone, N., G. Pfeifer, W. Faber, T. Eiter, G. Gottlob, S. Perri, and F. Scarcello. The DLV System for Knowledge Representation and Reasoning. 2002.
Dyfyniad MLALeone, N., et al. The DLV System for Knowledge Representation and Reasoning. 2002.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.