[1] Ravi P. Agarwal, Maria Meehan and Donal O. Rrgan, Fixed Point
Theory and Applications, Cambridge University Press, (2001).
[2] Michael D. Greenberg, Application of Green’s Function
Method, Prentice-hal, Englewood Cliffs, N. J, (1994).
[3] M. Kazemi, An oscillation for nonlinear third order equation in
n-dimential space, 38th Annual Iranian Mathematics Conference, Zanjan,
Iran, (2007), 53-55.
[4] R. H. Martin, Nonlinear Operators and Differential Equations in
Banach Spaces, John Wiley and Sons, (1976).