1. Bagemihl, F. “Some Boundary Properties of Normal Functions Bounded on Nontangential Arcs”, Arch. Math. 14, No. 6, 399–406 (1963).
2. Berberyan, S. L. “On boundary properties of subharmonic functions generating normal families on subgroups of automorphisms of the unit disk”, Izv. Akad. Nauk Arm. SSR 15, No. 4, 395–402 (1980). [in Russian]
3. Berberyan, S. L. “Angle boundary values of normal continuous functions”, Sov. Math., 30, No. 3, 28–35 (1986).
4. Lappan, P. “Some Results on Harmonic Normal Functions”, Math. Zeitschr. 90, No. 1, 155–159 (1965).
5. Rung, D. C. “Asymptotic Values of Normal Subharmonic Functions”, Math. Zeitschr. 84, No. 1, 9–15 (1964).