Park, Laihyuk; Na, Woongsoo; Lee, Gunwoo; Lee, Chang Ha; Park, Chang Yun; Cho, Yong Soo; Cho, Sungrae
ArticleIssue Date2011CitationKSII TRANSACTIONS ON INTERNET AND INFORMATION SYSTEMS, v.5, no.12, pp 2272 - 2293PublisherKSII-KOR SOC INTERNET INFORMATION