Progress of Theoretical PhysicsSome Remarks on the Non-infinitesimal Commutation RelationsEizo KanaiPublished Sep 1, 1949• 0 citationsPublisherAbstractEizo Kanai; Some Remarks on the Non-infinitesimal Commutation Relations*, Progress of Theoretical Physics, Volume 2, Issue 3, 1 October 1947, Pages 135–144, httDOI10.1143/ptp.2.135