References
- Honam Mathematical Journal v.23 no.1 Topics on fundamental topological algebras Ansari-Piri, E.
- Complete Normed Algebras Bonsall, F.F.;Duncan, J.
- Lecture Notes in Mathematics Perturbation of Banach Algebras Jarosz, K.
- Bull. Southern Math. Automatic Continuity Selected Examples Jarosz, K.
- Aeqationes Mathematicae v.63 Almost multiplicative functions and almost linear multiplicative functionals Semrl, P.