. "A COUPLE OF SOLUTIONS TO A (3+1)-DIMENSIONAL GENERALIZED KP EQUATION WITH VARIABLE COEFFICIENTS BY EXTENDED TRANSFORMED RATIONAL FUNCTION METHOD Vol. 3(1) Jan 2015, No. 19, pp. 188-194 M. MIRZAZADEH", Electronic Journal of Mathematical Analysis and Applications, 3, 1, 2015, -. doi: 10.21608/ejmaa.2015.310709