We obtain the general solution and the generalized Ulam-Hyers stability of the mixed type cubic and quartic functional equation in quasi-Banach spaces.
"Solution and Stability of a Mixed Type Cubic and Quartic Functional Equation in Quasi-Banach Spaces." Abstr. Appl. Anal. 2009 1 - 14, 2009. https://doi.org/10.1155/2009/417473