A comparative study of proprietary ERP and open source ERP modules on the value chain. - Sang-Heui Lee; Silvana Trimi; Donghyun Choi; Jin Sung Rha (Int. J. Inf. Decis. Sci., 2011)

The effect of ISO 14001 on equity structure. - Sang M. Lee; Yonghwi Noh; Donghyun Choi; Jin Sung Rha (Ind. Manag. Data Syst., 2014)