@article{oai:tsukuba.repo.nii.ac.jp:00019848, author = {西村, 泰一 and NISHIMURA, Hirokazu}, issue = {1}, journal = {Publications of the Research Institute for Mathematical Sciences}, month = {}, pages = {305--316}, title = {A Cut-Free Sequential System for the Propositional Modal Logic of Finite Chains}, volume = {19}, year = {1983}, yomi = {ニシムラ, ヒロカズ} }