Khalil, R., et al. “A New Definition of Fractional Derivative”. Journal of Computational and Applied Mathematics, vol. 264, 2014, pp. 65-70, https://doi.org/10.1016/j.cam.2014.01.002.
Khalil, R., Al Horani, M., Yousef, A., & Sababheh, M. (2014). A new definition of fractional derivative. Journal of Computational and Applied Mathematics, 264, 65-70. https://doi.org/10.1016/j.cam.2014.01.002
Khalil R, Al Horani M, Yousef A, Sababheh M. A new definition of fractional derivative. Journal of Computational and Applied Mathematics. 2014;264:65-70.