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Székelyhidi L.(1982)Note on a stability theorem Can. Math. Bull. 25 500-501
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Székelyhidi L.(1982)On a theorem of Baker, Lawrence and Zorzitto Proc. Am. Math. Soc. 84 95-96
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Székelyhidi L.(1983)The stability of d’Alembert-type functional equations Acta Sci. Math. (Szeged) 44 313-320
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Székelyhidi L.(1988)Stability of some functional equations in economics Rend. Sem. Mat. Fis. Milano 58 169-176
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Székelyhidi L.(1989)An abstract superstability theorem Abh. Math. Sem. Univ. Hamburg 59 81-83
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Székelyhidi L.(1990)The stability of the sine and cosine functional equations Proc. Am. Math. Soc. 110 109-115
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Székelyhidi L.(1990)Stability properties of functional equations describing the scientific laws J. Math. Anal. Appl. 150 151-158
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Székelyhidi L.(2006)Superstability of moment functions on hypergroups Nonlinear Funct. Anal. Appl. 11 815-821