Loo-Keng Hua, On the Theory of Fuchsian Functions of Several Variables, Annals of Mathematics, Vol. 47, No. 2 (Apr., 1946), pp. 167-191 ...

Yoshimasa Michiwaki, On the Theory of Analytic Functions of Several Complex Variables, Science Reports of the Tokyo Kyoiku Daigaku, Section A, Vol. 6, No. 163/167 (December 15, 1959), pp. 307-323 ...