@article{oai:repository.dl.itc.u-tokyo.ac.jp:00039751, author = {Kawai, Takahiro 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 = {267--270}, title = {On the propagation of analyticity of solutions of systems of linear differential equations with constant coefficients}, volume = {22}, year = {1975} }