Alam, M. N., M. G. Hafez, M. A. Akbar, and H. .-O. -Roshid. “Exact Solutions to the (2+1)-Dimensional Boussinesq Equation via exp(?(?))-Expansion Method”. Journal of Scientific Research, vol. 7, no. 3, Sept. 2015, pp. 1-10, doi:10.3329/jsr.v7i3.17954.