On the Functional Equation f(p + qx + rf (x)) = a + bx + cf (x). (Short Communication). Seiji Nabeya — 1974 Aequationes mathematicae
On the Functional Equation f(p + qx + rf(x)) = a + bx + cf(x). Seiji Nabeya — 1974 Aequationes mathematicae