Kuczma, Marek An introduction to the theory of functional equations and inequalities : cauchy's equations and Jensen's inequality / - 2nd - Basel: Birkhauser, 2009 - xiv, 595p. Bibl. Index. "Purchased under NBHM grant for the year 2009-2010" ISBN: 9783764387488 Dewey Class. No.: 515.1 / K95.IT