Rabha W. Ibrahim,  Existence of Iterative Cauchy Fractional Differential Equation.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2013, vol. 76(4). 639 - 644
    [viewed 18 April 2024]. Available from: https://publications.waset.org/pdf/17037.