ON TE EXISTENCE OF PERIODIC SOLUTION FOR CERTAIN NONLINEAR THIRD ORDER DIFFERENTIAL EQUATIONS

. (1992). ON TE EXISTENCE OF PERIODIC SOLUTION FOR CERTAIN NONLINEAR THIRD ORDER DIFFERENTIAL EQUATIONS. (e31520). Journal of Sciences, Islamic Republic of Iran, 3(2), e31520

. "ON TE EXISTENCE OF PERIODIC SOLUTION FOR CERTAIN NONLINEAR THIRD ORDER DIFFERENTIAL EQUATIONS" .e31520 , Journal of Sciences, Islamic Republic of Iran, 3, 2, 1992, e31520.

. (1992). 'ON TE EXISTENCE OF PERIODIC SOLUTION FOR CERTAIN NONLINEAR THIRD ORDER DIFFERENTIAL EQUATIONS', Journal of Sciences, Islamic Republic of Iran, 3(2), e31520.

, "ON TE EXISTENCE OF PERIODIC SOLUTION FOR CERTAIN NONLINEAR THIRD ORDER DIFFERENTIAL EQUATIONS," Journal of Sciences, Islamic Republic of Iran, 3 2 (1992): e31520,

. ON TE EXISTENCE OF PERIODIC SOLUTION FOR CERTAIN NONLINEAR THIRD ORDER DIFFERENTIAL EQUATIONS. J. Sci. I. R. I.. 1992;3(2):e31520.