Hailong Zhu and  Zhaoxiang Li and  Kejun Zhuang,  A Contractor Iteration Method Using Eigenpairs for Positive Solutions of Nonlinear Elliptic Equation.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    July 2010, vol. 43(7). 885 - 888
    [viewed 19 April 2021]. Available from: https://publications.waset.org/pdf/12039.