@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039773, author = {Murata, Minoru and Komatsu, H.}, issue = {3}, journal = {Journal of the Faculty of Science, the University of Tokyo. Sect. 1 A, Mathematics = 東京大学理学部紀要. 第1類A, 数学}, month = {Dec}, note = {application/pdf}, pages = {395--404}, title = {A theorem of Liouville type for partial differential equations with constant coefficients}, volume = {21}, year = {1974} }