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The Thirty-first International Symposium on Functional Equations, August 22–August 28, 1993, Debrecen, Hungary

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Szabó, G. The Thirty-first International Symposium on Functional Equations, August 22–August 28, 1993, Debrecen, Hungary. Aeq. Math. 47, 263–327 (1994). https://doi.org/10.1007/BF01832964

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