@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040015, author = {Noguchi, Junjiro}, issue = {4}, journal = {Journal of mathematical sciences, the University of Tokyo}, month = {Mar}, pages = {661--675}, title = {Another Direct Proof of Oka's Theorem (Oka IX)}, volume = {19}, year = {2013} }