Mohamed K. El Daou,  Approximation of Sturm-Liouville Problems by Exponentially Weighted Legendre-Gauss Tau Method.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    May 2008, vol. 17(5). 312 - 318
    [viewed 25 April 2024]. Available from: https://publications.waset.org/pdf/1756.