Jie Bao George Voutsadakis Giora Slutzki Vasant Honavar Package-Based Description Logics. 349-371 2009 Modular Ontologies http://dx.doi.org/10.1007/978-3-642-01907-4_16 series/lncs/5445 db/series/lncs/lncs5445.html#BaoVSH09