%0 Journal Article %T Periodic Solution of a Certain Class of Nonlinear Fourth Order Differential Equation %J Scientia Iranica %I Sharif University of Technology %Z 1026-3098 %A Mehri, B. %A Shadman, D. %D 1997 %\ 03/01/1997 %V 4 %N 1 %P 1-7 %! Periodic Solution of a Certain Class of Nonlinear Fourth Order Differential Equation %R 10.24200/sci.2020.21754 %X In this paper the fourth.... %U https://scientiairanica.sharif.edu/article_21754_91e01305793699e51ccfedd6270cbb68.pdf