@InProceedings{Loyer03c,
author =       "Loyer, Yann and Straccia, Umberto",
title =        "The Approximate Well-founded Semantics for Logic Programs with Uncertainty",  
booktitle =    28th International Symposium on Mathematical Foundations of Computer Science (MFCS-2003),
publisher =    "Springer Verlag",
series =       "Lecture Notes in Computer Science",
number =       "2747",
pages  = "541-550",
address ="Bratislava, Slovak Republic",
year	="2003"
}