Fu , Hai-Ming and Zheng-De Dai . "Double Exp-function Method and Application" International Journal of Nonlinear Sciences and Numerical Simulation, 10.7 (2011): 927-934. Retrieved 23 May. 2013, from doi:10.1515/IJNSNS.2009.10.7.927

Fu , H. & Dai , Z. (2011). Double Exp-function Method and Application. International Journal of Nonlinear Sciences and Numerical Simulation, 10(7), pp. 831-975. Retrieved 23 May. 2013, from doi:10.1515/IJNSNS.2009.10.7.927

Fu , Hai-Ming and Zheng-De Dai. 2011. Double Exp-function Method and Application. International Journal of Nonlinear Sciences and Numerical Simulation. 10(7): 831-975. Retrieved 23 May. 2013, from doi:10.1515/IJNSNS.2009.10.7.927