@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039911,
 author = {Ito, Seizo},
 issue = {1},
 journal = {Journal of the Faculty of Science, University of Tokyo. Sect. 1, Mathematics, astronomy, physics, chemistry = 東京大學理學部紀要. 第1類, 數學, 天文學, 物理學, 化學},
 month = {Oct},
 note = {application/pdf},
 pages = {20--28},
 title = {On Neumann problem for non-symmetric second order partial differential operators of elliptic type},
 volume = {10},
 year = {1963}
}