Laura Giordano Valentina Gliozzi Gian Luca Pozzato KLMLean 2.0: A Theorem Prover for KLM Logics of Nonmonotonic Reasoning. 238-244 2007 conf/tableaux/2007 TABLEAUX http://dx.doi.org/10.1007/978-3-540-73099-6_19 db/conf/tableaux/tableaux2007.html#GiordanoGP07