Ahmad, M. N., Colomb, R. M., & Sadiq, S. (2008). A relevant portion of an ontology: Defining a system of ED rules using a part-whole relationship. Institute of Electrical and Electronics Engineers.

Ahmad, Mohammad Nazir, Robert M. Colomb, and Shazia Sadiq. A Relevant Portion of an Ontology: Defining a System of ED Rules Using a Part-whole Relationship. Institute of Electrical and Electronics Engineers, 2008.

Ahmad, Mohammad Nazir, Robert M. Colomb, and Shazia Sadiq. A Relevant Portion of an Ontology: Defining a System of ED Rules Using a Part-whole Relationship. Institute of Electrical and Electronics Engineers, 2008.