Layeghy, Siamak, Farzaneh Pakzad, and Marius Portmann. “A New QoS Routing Northbound Interface for SDN”. Journal of Telecommunications and the Digital Economy 5, no. 1 (March 31, 2017): 92-115. Accessed February 23, 2020. https://jtde.telsoc.org/index.php/jtde/article/view/91.