Kim, Kwang-Jae, Wan-Seon Shin, Dae-Kee Min, Hyun-Jin Kim, Jin-Sung Yoo, Hyun-Min Lim, Soo Ha Lee, and Yong-Kee Jeong. “Service Quality Model for IPTV Service: Identification of Key Features and Their Relationships”. International Journal of Industrial Engineering: Theory, Applications, and Practice 16, no. 4 (August 13, 2009). Accessed August 17, 2022. https://journals.sfu.ca/ijietap/index.php/ijie/article/view/81.