Multiplicative perturbations in semigroup theory with the (Z)-condition. M. Jung — 1996 Semigroup forum
Hyers-Ulam stability of mean value points. Gavruta, P.; Jung, S.-M.; Li, Y. — 2010 Annals of Functional Analysis (AFA) [electronic only]
AQCQ-functional equation in non-Archimedean normed spaces. Gordji, M.Eshaghi; Khodabakhsh, R.; Jung, S.-M.; Khodaei, H. — 2010 Abstract and Applied Analysis