Team, S. 2011. Stability of a Mixed Type Cubic and Quartic Functional Equation in non-Archimedean ℓ-Fuzzy Normed Spaces: Ali Ebadian, Norouz Ghobadipour, Meysam Bavand Savadkouhi, Madjid Eshaghi Gordji. Thai Journal of Mathematics. 9, 2 (Aug. 2011), 249–265.