Global regularity of the ...-Neumann problem on circular domains. So-Chin Chen (1989) Mathematische Annalen
Group actions and envelopes of holomorphy. Stefano Trapani, E. Casadio Tarabusi (1994) Mathematische Annalen
Growth of H p functions in tubes. Carmichael, Richard D., Richters, Stephen P. (1981) International Journal of Mathematics and Mathematical Sciences