On the stability of generalized quartic mappings in quasi- β -normed spaces. Kang, Dongseung — 2010 Journal of Inequalities and Applications [electronic only]
Stability problems of quintic mappings in quasi- β -normed spaces. Cho, In Goo; Kang, Dongseung; Koh, Heejeong — 2010 Journal of Inequalities and Applications [electronic only]