Yel, G., and Z. F. Koçak. “On the Exact Solutions of the Fractional (2+1)- Dimensional Davey - Stewartson Equation System”. An International Journal of Optimization and Control: Theories & Applications (IJOCTA), vol. 7, no. 3, Oct. 2017, pp. 265-70, doi:10.11121/ijocta.01.2017.00485.