N. Zahira Jahan, and Bhagesh B.T. “Robust Execution of Packet Flow in Routers to Prevent Ddos Attack Using Trace Back”. International Journal of Intellectual Advancements and Research in Engineering Computations, vol. 5, no. 2, Aug. 2017, pp. 1611-20, https://ijiarec.com/ijiarec/article/view/1541.