1. Bloch, A., Sur les systems de fonctions holomorphes a varietes lineaires lacunaires, Ann. de l’Ec. Norm. 42 (1925).
2. Borel, E., “Lecons sur les fonctions entieres,” Gauthier-Villars, Paris, 1921.
3. Edrei, A., Meromorphic functions with three radially distributed values, Trans. A.er. Math. Soc. 78 (1955), 276–294.
4. Hellerstein, S. and Yang, C.C., Half-plane Tumura-Clunie theorems and the real zeros of successive derivatives, J. London Math. Soc. 4 (1972), 469–481.
5. Levin, B. Ja. and Ostrovskii, I.V., The dependence of the growth of an entire function on the distribution of the zeros of its derivatives, Amer. Math. Soc. Transi. (2) 32 (1963), 322–357.