Annales Polonici Mathematici > 1994-1995 > 60 > 3 > 221-230
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journal ISSN : | 0066-2216 |
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Bibliography
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[1] J. Aczél and J. Dhombres, Functional Equations in Several Variables, Encyclopedia Math. Appl. 31, Cambridge University Press, Cambridge, Sydney, 1989.
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[2] E. Hille and R. S. Phillips, Functional Analysis and Semi-groups, Amer. Math. Soc. Colloq. Publ. 31, Amer. Math. Soc., Providence, R.I., 1957.
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[3] M. Kuczma, An Introduction to the Theory of Functional Equations and Inequalities. Cauchy's equation and Jensen's inequality, Prace Nauk. Uniw. Śl. 489, Polish Scientific Publishers, 1985.