Hyers-ulam Stability of a General Quadratic Functional Equation Hark-Mahn Kim — 2003 Publications de l'Institut Mathématique
Stability of functional inequalities with Cauchy-Jensen additive mappings. Cho, Young-Sun; Kim, Hark-Mahn — 2007 Abstract and Applied Analysis
On the Hyers-Ulam stability of quadratic functional equations. Chang, Ick-Soon; Kim, Hark-Mahn — 2002 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
Stability of approximate quadratic mappings. Kim, Hark-Mahn; Kim, Minyoung; Lee, Juri — 2010 Journal of Inequalities and Applications [electronic only]
Stability of quadratic functional equations via the fixed point and direct method. Son, Eunyoung; Lee, Juri; Kim, Hark-Mahn — 2010 Journal of Inequalities and Applications [electronic only]
Stability problem of Ulam for Euler-Lagrange quadratic mappings. Kim, Hark-Mahn; Rassias, John Michael; Cho, Young-Sun — 2007 Journal of Inequalities and Applications [electronic only]
Extended stability problem for alternative Cauchy-Jensen mappings. Kim, Hark-Mahn; Jun, Kil-Woung; Rassias, John Michael — 2007 JIPAM. Journal of Inequalities in Pure & Applied Mathematics [electronic only]
On functional inequalities originating from module Jordan left derivations. Kim, Hark-Mahn; Kang, Sheon-Young; Chang, Ick-Soon — 2008 Journal of Inequalities and Applications [electronic only]