KHAIRI, S. ., B. . RAOUYANE, and M. . BELLAFKIH. “TOWARDS ENHANCED QOS MANAGEMENT SDN-BASED FOR NEXT GENERATION NETWORKS WITH QOE EVALUATION: IMS USE CASE”. Journal of Mobile Multimedia, vol. 13, no. 3-4, July 2017, pp. 183-96, https://journals.riverpublishers.com/index.php/JMM/article/view/3771.