Kuczma, M. (1968). Functional equations in a single variable. Warszawa: [PWN-Polish Scientific Publishers].
Παραπομπή Chicago StyleKuczma, Marek. Functional Equations in a Single Variable. Warszawa: [PWN-Polish Scientific Publishers], 1968.
Παραπομπή MLAKuczma, Marek. Functional Equations in a Single Variable. Warszawa: [PWN-Polish Scientific Publishers], 1968.
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