- Common Sense Problem Page - Corpus of challenging problems for the representation of commonsense knowledge.
- Enabling Technology For Knowledge Sharing - An article published in AI Magazine in 1991, describing ontology-driven knowledge base architectures.
- Knowledge Representation - Detailed online summary of 1999 book by Harvard mathematician John W. Sowa, including sections on logic and ontology.
- What is a Knowledge Representation? - An introductory critical paper by R. Davis, H. Shrobe, and P. Szolovits in AI Magazine - 1993
