Study on the Development Methodology of Digital Textbook on KNOU. - Kwang-Sik Chung; Joo Hee Kim; Joo Hee Choi; Hye Won Byun (CSREA EEE, 2010)

Design and Implementation of Repeatable and Short-spanned m-Learning Model for English Listening and Comprehension Mobile Digital TextbookContents on Smartphone. - Hye Won Byun; Sung-Ho Chin; Kwang-Sik Chung (KSII Trans. Internet Inf. Syst., 2014)