References
- Proc. Nat. Acad. Sci. v.27 On the stability of the linear functional equation D. H. Hyers
- Mathematica v.39 no.2 On the modified Hyers-Ulam-Rassias stability of the functional equa-tion for gamma function S.-M. Jung
- Results Math v.33 On the stability of gamma functional equation
- Proc. Amer. Match. Soc. v.72 On the stability of the linear mapping in Banach spaces T. M. Rassias
- Science editions Problems in Mordern Mathematics S. M. Ulam