A. Grigoryan, and S. Agaian. Applied Mathematics and Sciences: An International Journal (MathSJ), volume 1 of IFIP Advances in Information and Communication Technology, page 23-39. Springer, (December 2014)
P. D, C. Veeramani, B. Shalini, and R. Karthika. International Journal of Innovative Science and Modern Engineering (IJISME), 2 (10):
41-45(September 2014)