What are ontologies, and why do we need them? - B. Chandrasekaran 001; John R. Josephson; V. R. Benjamins (IEEE Intell. Syst., 1999)

WonderTools? A comparative study of ontological engineering tools. - A. J. Duineveld; R. Stoter; M. R. Weiden; B. Kenepa; V. R. Benjamins (Int. J. Hum. Comput. Stud., 2000)