1. Maintaining knowledge about temporal intervals;Allen;Commun. ACM,1983
2. On the epistomological status of semantic networks;Brachman,1979
3. The tractability of subsumption in frame-based description languages;Brachman,1984
4. An overview of the KL-ONE knowledge representation system;Brachman;Cognitive Sci.,1985
5. An essential hybrid reasoning system: Knowledge and symbol level accounts in KRYPTON;Brachman,1985