1. K. Noshiro, ?Contributions to the theory of meromorphic functions in the unit circle,? J. Fac. Sci. Hokkaido Univ.,7, 149?159 (1938).
2. O. Lehto and K. I. Virtanen, ?Boundary behavior and normal meromorphic functions,? Acta Math.,9, 47?65 (1957).
3. F. Bagemihl and W. Seidel, ?Koebe arcs and Fatou points of normal functions,? Comment. Math. Helv.,36, No. 1, 9?18 (1961).
4. V. I. Gavrilov, ?On the set of angular boundary values of normal meromorphic functions,? Dokl. Akad. Nauk SSSR, 141, No. 3, 525?526 (1961).
5. P. Lappan, ?Some sequential properties of normal and non-normal functions with applications to automorphic functions,? Comment. Math. Univ. St. Pauli,12, No. 3, 41?57 (1964).