BORHANIFAR, A., & VALIZADEH, S. (2012). Numerical Solution for Fractional Partial Differential Equations Using Crank-Nicolson Method with Shifted Grünwald Estimate. Walailak Journal of Science and Technology (WJST), 9(4), 433–444. Retrieved from https://wjst.wu.ac.th/index.php/wjst/article/view/240