Fengxia Zheng,  Unique Positive Solution of Nonlinear Fractional Differential Equation Boundary Value Problem.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    January 2013, vol. 83(11). 1622 - 1626
    [viewed 20 April 2024]. Available from: https://publications.waset.org/pdf/9997232.