Mohammad Najafi and  Ali Jamshidi,  Multiple Soliton Solutions of (2+1)-dimensional Potential Kadomtsev-Petviashvili Equation.   journal   = {International Journal of Mathematical and Computational Sciences}, [online]. World Academy of Science, Engineering and Technology.
    December 2011, vol. 60(12). 1964 - 1967
    [viewed 14 May 2021]. Available from: https://publications.waset.org/pdf/6076.