Taehee Lee Ig-hoon Lee Suekyung Lee Sang-goo Lee Dongkyu Kim Jonghoon Chun Hyunja Lee Junho Shim Building an operational product ontology system. 16-28 2006 5 Electronic Commerce Research and Applications 1 http://dx.doi.org/10.1016/j.elerap.2005.08.005 db/journals/ecra/ecra5.html#LeeLLLKCLS06