Reference:
Ilkka Niemelä. Stable models and difference logic. Annals of Mathematics and Artificial Intelligence, 53(1–4):313–329, 2008.
Suggested BibTeX entry:
@article{Niemela:AMAI2008, author = {Ilkka Niemel{\"a}}, journal = {Annals of Mathematics and Artificial Intelligence}, number = {1--4}, pages = {313--329}, title = {Stable Models and Difference Logic}, volume = {53}, year = {2008}, }