Stability of a quadratic functional equation in the spaces of generalized functions. Lee, Young-Su — 2008 Journal of Inequalities and Applications [electronic only]
Stability of a Jensen type functional equation. Lee, Young-Su; Chung, Soon-Yeong — 2007 Banach Journal of Mathematical Analysis [electronic only]
Stability of cubic functional equation in the spaces of generalized functions. Lee, Young-Su; Chung, Soon-Yeong — 2007 Journal of Inequalities and Applications [electronic only]
Stability of quartic functional equations in the spaces of generalized functions. Lee, Young-Su; Chung, Soon-Yeong — 2009 Advances in Difference Equations [electronic only]