The National Cancer Institute Thesaurus (NCIT)

Werner Ceusters, Barry Smith, Louis Goldberg, “A Terminological and Ontological Analysis of the NCI Thesaurus”, Methods of Information in Medicine, 44 (2005), 498-507.

Anand Kumar and Barry Smith, “Oncology Ontology in the NCI Thesaurus”, Artificial Intelligence in Medicine Europe (AIME 2005) (Lecture Notes in Computer Science 3581), 213–220.