Talaat S. El-Danaf,  Quartic Nonpolynomial Spline Solutions for Third Order Two-Point Boundary Value Problem.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    September 2008, vol. 21(9). 637 - 640
    [viewed 26 February 2020]. Available from: https://publications.waset.org/pdf/13787.