no. 2
On the stability of mappings and an answer to a problem of Th. M. Rassias
Annales mathématiques Blaise Pascal, Tome 2 (1995) no. 2, pp. 55-60 
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     title = {On the stability of mappings and an answer to a problem of {Th.} {M.} {Rassias}},
     journal = {Annales math\'ematiques Blaise Pascal},
     pages = {55--60},
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}
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P. Găvruţa; M. Hossu; D. Popescu; C. Căprău. On the stability of mappings and an answer to a problem of Th. M. Rassias. Annales mathématiques Blaise Pascal, Tome 2 (1995) no. 2, pp. 55-60. https://ambp.centre-mersenne.org/item/AMBP_1995__2_2_55_0/

[1] Găvruţa, P., A generalization of the HYERS-ULAM-RASSIAS stability of approximately additive mappings ,Journal of Math. Analysis and Appl. 184 (1994), 431-436. | Zbl | MR

[2] Hyers,D.H. AND Rassias, Th.M., Approximate homomorphisms , Aequationes Math.44 (1992), 125-153. | Zbl | MR

[3] Rassias,Th.M., On a modified HYERS-ULAM sequence , Journal of Math. Analysis and Appl. 158 (1991), 106-113. | Zbl | MR

[4] Ulam,S.M., Problems in modern mathematics, chap. VI, Science eds. ,Wiley, New York, 1960. | Zbl | MR