@inproceedings{Nicolas_Saubion_Stephan_JELIA_02, author = {P. Nicolas and F. Saubion and I. St{\'e}phan}, title = {{A}nswer {S}et {P}rogramming by {A}nt {C}olony {O}ptimization}, booktitle = {Proceedings of the 8th European Conference on Logics in Artificial Intelligence (JELIA'02)}, year = {2002}, pages = {481-492} }