Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hashimoto S,"On differentiable manifold with almost quaternion contact structure,2","Science Reports of the Faculty of Literature and Science, Hirosaki University",03712591,Hirosaki : Faculty of Literature and Science,1961-12,8,2,????,https://cir.nii.ac.jp/crid/1520290883082431488,