Kuczma, Marek. Functional equations in a single variable. - Warszawa: [PWN - Polish Scientific Publishers], 1968. - 383 p.: illus., 25 cm. - Polska Akademia Nauk. Monografie matematyczne, t. 46 . - Monografie matematyczne. t. 46. . On spine: Functional equations. Bibliography: p. [308]-371. LCCN: 68004128 Subjects--Topical Terms: Functional equations. Dewey Class. No.: 515.83 / K95f