Francesco Buccafurri Gianluca Caminiti Rosario Laurendi A Logic Language with Stable Model Semantics for Social Reasoning. 718-723 2008 ICLP http://dx.doi.org/10.1007/978-3-540-89982-2_64 conf/iclp/2008 db/conf/iclp/iclp2008.html#BuccafurriCL08