Fariborzi Araghi, M. A., and S. Mamizadeh Chatghayeh. “THE USE OF A RUNGE-KUTTA SCHEME FOR AN ODE-PDE MODEL OF SUPPLY CHAINS”. International Journal of Mathematical Modelling & Computations, vol. 3, no. 1, Mar. 2013, pp. 43-50, http://oiccpress.com/ijm2c/article/view/11175.