참고문헌
- Proc. Amer. Math. Soc. v.74 The stability of the equation f(x+y) = f(x) f(y) J.Baker;J.Lawrence;F.Zorzitto
- Aequ. Math. v.54 On Hyers-Ulam stability for a class of functional equations C.Bolelli
- Aequ. Math. v.50 Hyers-Ulam stability of functioal equations in several variables G.L.Forti
- Proc. Amer. Math. Soc. v.124 The stability of the exponential equation R.Ger;P.Semrl
- Proc. Nat. Acad. Sci. v.27 On the stability of the linear functioal equation D.H.Hyers
- Problems in morden mathematics S.M.Ulam;Science(ed.)