Sam Teek Ling and  Norhashidah Hj. Mohd. Ali,  New High Order Group Iterative Schemes in the Solution of Poisson Equation.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    November 2013, vol. 84(12). 1694 - 1699
    [viewed 11 May 2024]. Available from: https://publications.waset.org/pdf/9996732.