Hassan Saberi-Nik and  Mahin Golchaman,  The Homotopy Analysis Method for Solving Discontinued Problems Arising in Nanotechnology.   journal   = {International Journal of Physical and Mathematical Sciences}, [online]. World Academy of Science, Engineering and Technology.
    April 2011, vol. 52(4). 645 - 648
    [viewed 07 July 2020]. Available from: https://publications.waset.org/pdf/12544.