@inproceedings{Loyer03d,
Year = {2003},
Title = {Default Knowledge in Logic Programs with Uncertainty},
Address = {Mumbai, India},
Number = {2916},
Pages = {466--480},
publisher =    "Springer Verlag",
series =    "Lecture Notes in Computer Science",
Booktitle = {Proc.~of the 19th Int.~Conf.~on Logic Programming  (ICLP-03)},
Author = {Loyer, Yann and Straccia, Umberto}}