1. Davis M.,Hilbert's tenth problem is unsolvable, Amer Math Monthly,80 (1973), 233–269.
2. Gelfond A.O.,Sur les fonctions entières qui prennent des valeurs entières aux points β n, n=1, ... (En Russe), Mat Sb,40 (1933), 42–47.
3. Lecture Notes in Math;F. Gramain,1990
4. Gramain F., Schnitzer F.J.,Ganze ganzwertige Funktionen: Historiche Bemerkungen, Complex methods on partial differential equations, Math Res,53 (1989), 151–177.
5. Hall R.R.,On pseudo-polynomials, Mathematika,18 (1971), 71–77.