Approximate Quartic and Quadratic Mappings in Quasi-Banach Spaces. - Madjid Eshaghi Gordji; Hamid Khodaei; Hark-Mahn Kim (Int. J. Math. Math. Sci., 2011)

Approximate linear derivations and functional inequalities with applications. - Hark-Mahn Kim; Ick-Soon Chang (Appl. Math. Lett., 2012)