1. B. V. Vinnitskii and M. N. Sheremeta, ?Asymptotic coefficients of Dirichlet series representing entire functions,? Usp. Mat. Nauk,27, No. 2, 147?157 (1975).
2. O. P. Juneja and G. P. Kappoor, ?On the lower order of entire Dirichlet series,? Math. Ann., 197 (1972).
3. B. Ya. Levin, Distribution of Roots of Entire Functions [in Russian], Gostekhizdat, Moscow (1956).
4. S. K. Balashov, ?On the connection of the growth of an entire function of generalized order with the coefficients of its power-series expansion and the distribution of roots,? Izv. Vyssh. Uchebn. Zaved., No. 8, 10?18 (1972).
5. M. N. Sheremeta, ?On coefficients of power-series expansions of entire functions,? Teoriya Funktsii, Funktsional'nyi Analiz i Ikh Prilozheniya,16, 41?44 (1972).