1. A. I. Bandura and O. B. Skaskiv, “Entire functions of bounded l-index in direction,” Mat. Stud., 27, No. 1, 30–52 (2007).
2. A. I. Bandura and O. B. Skaskiv, Entire Functions of Several Variables of Bounded Index [in Ukrainian], Publisher I. E. Chyzhykov, Lviv (2016).
3. A. D. Kuzyk and M. N. Sheremeta, “Entire functions of bounded l-distribution of values,” Math. Notes., 39, No. 1, 3–8 (1986).
4. B. Lepson, “Differential equations of infinite order, hyper-Dirichlet series and entire functions of bounded index,” in: Proc. Symp. Pure Math., 11 (1968), pp. 298–307.
5. S. M. Shah, “Entire function of bounded index,” in: Lect. Notes Math., 599, Springer, Berlin; Heidelberg (1977), pp. 117–145.