Wu, Qingtao, Mingchuan Zhang, Ruijuan Zheng, and Wangyang Wei. “A QoS-Satisfied Prediction Model for Cloud-Service Composition Based on Hidden Markov Model”. International Journal of Online and Biomedical Engineering (iJOE) 9, no. 3 (June 11, 2013): pp. 67–71. Accessed January 20, 2022. https://online-journals.org/index.php/i-joe/article/view/2678.