1 |
S. M. Ulam, A Collection of the Mathematical Problems, Interscience Publ., New York, 1960.
|
2 |
D. H. Hyers, On the stability of the linear functional equation, Proc. Natl. Acad. Sci. 27 (1941) 222-224.
DOI
ScienceOn
|
3 |
S. Gahler, 2-metrische Raume und ihre topologische Struktur, Math. Nachr. 26 (1963) 115-148.
DOI
|
4 |
S. Gahler, Lineare 2-normierte Raumen, Math. Nachr. 28 (1964) 1-43.
DOI
|
5 |
W.-G. Park, Approximate additive mappings in 2-Banach spaces and related topics, J. Math. Anal. Appl. 376 (2011) 193-202.
DOI
ScienceOn
|
6 |
S. Gahler, Uber 2-Banach-Raume, Math. Nachr. 42 (1969) 335-347.
DOI
|
7 |
A. White, 2-Banach spaces, Doctorial Diss., St. Louis Univ., 1968.
|
8 |
A. White, 2-Banach spaces, Math. Nachr. 42 (1969) 43-60.
DOI
|