Comment on: “Application of Exp-function method for (3+1 )-dimensional nonlinear evolution equations” [Comput. Math. Appl. 56 (2008) 1451–1456]

We show that Boz and Bekir [A. Boz, A. Bekir, Application of Exp-function method for (3+13+1)-dimensional nonlinear evolution equations, Comput. Math. Appl. 56 (2008) 1451–1456] obtained some incorrect solutions for the equations studied by means of the Exp-function method. We verify our assertion by direct substitution and pole order analysis. In addition, we provide the correct results using the same approach.