References
- [1] Baron K., Orthogonally additive bijections are additive, Aequationes Math. 89 (2015), 297-299.10.1007/s00010-013-0242-6
- [2] Baron K., On the continuous dependence of solutions to orthogonal additivity problem on given functions, Ann. Math. Sil. 29 (2015), 19-23.
- [3] Baron K., On orthogonally additive injections and surjections, Comment. Math. 55 (2015), 157-162.
- [4] Baron K., Rätz J., On orthogonally additive mappings on inner product spaces, Bull. Polish Acad. Sci. Math. 43 (1995), 187-189.
- [5] Kuczma M., An introduction to the theory of functional equations and inequalities. Cauchy’s equation and Jensen’s inequality, Second edition (edited by A. Gilányi), Birkhäuser Verlag, Basel, 2009.10.1007/978-3-7643-8749-5
- [6] Rätz J., On orthogonally additive mappings, Aequationes Math. 28 (1985), 35-49.10.1007/BF02189390
- [7] Sikorska J., Orthogonalities and functional equations, Aequationes Math. 89 (2015), 215-277.10.1007/s00010-014-0288-0