Ja'afar Mohamad Jawad, Anwar J, et al. “New Soliton Solutions of the (2+1)-Dimensional System Davey-Stewartson Equation”. International Journal of Engineering & Technology, vol. 7, no. 4.1, Sept. 2018, pp. 37-41, https://doi.org/10.14419/ijet.v7i4.1.19489.