Martin Suda Geoff Sutcliffe Patrick Wischnewski Manuel Lamotte-Schubert Gerard de Melo External Sources of Axioms in Automated Theorem Proving. 281-288 2009 KI http://dx.doi.org/10.1007/978-3-642-04617-9_36 conf/ki/2009 db/conf/ki/ki2009.html#SudaSWLM09