M. Ortiz de la Fuente, D. Calvanese, T. Eiter:
"Data Complexity of Query Answering in Expressive Description Logics with Nominals";
Report for TU Wien, Institut fuer Informationssysteme, INFSYS RR-1843-06-03; Report No. INFSYS RR-1843-06-03, 2006; 44 pages.