TY  - JOUR
AU  - Ghasemi, M.
AU  - Azizi, A.
AU  - Fardi, M.
TI  - Numerical solution of seven-order Sawada-Kotara
equations by homotopy perturbation method
JO  - Theory of Approximation and Applications
VL  - 7
IS  - 1
SP  - 69
EP  - 77
PY  - 2013
DO  - 
ER  -