Job H. Domingo and  Carolina Bancayrin-Baguio,  On the Sphere Method of Linear Programming Using Multiple Interior Points Approach.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2012, vol. 72(12). 1727 - 1733
    [viewed 24 April 2024]. Available from: https://publications.waset.org/pdf/9920.