Martin Buchheit Francesco M. Donini Werner Nutt Andrea Schaerf A Refined Architecture for Terminological Systems: Terminology = Schema + Views. 209-260 1998 99 Artif. Intell. 2 db/journals/ai/ai99.html#BuchheitDNS98 http://dx.doi.org/10.1016/S0004-3702(97)00079-9