Boris Konev Carsten Lutz Dirk Walther Frank Wolter Semantic Modularity and Module Extraction in Description Logics. 55-59 2008 ECAI http://dx.doi.org/10.3233/978-1-58603-891-5-55 conf/ecai/2008 db/conf/ecai/ecai2008.html#KonevLWW08