Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Hidekazu Nariai and Toshiei Kimura and Research Institute for Theoretical Physics Hiroshima University,On the Canonical Formalism of the Gravitational Field in the Expanding Universe,Supplement of the Progress of theoretical physics = Supplement of the Progress of theoretical physics,03759687,,1963,25,,103,https://cir.nii.ac.jp/crid/1573387451737698048,