1. Spear A.D.: Ontology for the Twenty First Century: An Introduction with Recommendations. Institute for Formal Ontology and Medical Information Science (IFOMIS), Saarbrücken, Germany. University at Buffalo, New York. (2006).
http://ifomis.buffalo.edu/bfo/documents/manual.pdf
2. Washington, N., Lewis, S.: Ontologies: Scientific Data Sharing Made Easy. Nat. Educ. 1(3), 5 (2008)
3. Almeida, M.B., Barbosa, R.R.: Ontologies in knowledge management support - a case study. J Am Soc. Inf. Sci. Technol. 60(10), 2032–2047 (2009)
4. Wernig, G., Gilliland, G.: Pathobiology of acute myeloid leukemia. In: Hoffman, R., et al. (eds.) Hematology: Basic Principle and Practice. 5th.ed. Churchill Livingstone, pp. 921–932. Elsevier, Philadelphia (2009)
5. Michael, J., Mejino Jr., J.L., Rosse, C.: The role of definitions in biomedical concept representation.In: Proceedings of the AMIA Symposium, pp. 463–467 (2001)