%0 Journal Article %T Solution and Stability of a Mixed Type Cubic and Quartic Functional Equation in Quasi-Banach Spaces %A M. Eshaghi Gordji %A S. Zolfaghari %A J. M. Rassias %A M. B. Savadkouhi %J Abstract and Applied Analysis %D 2009 %I Hindawi Publishing Corporation %R 10.1155/2009/417473 %X We obtain the general solution and the generalized Ulam-Hyers stability of the mixed type cubic and quartic functional equation ( %U http://www.hindawi.com/journals/aaa/2009/417473/