Progress of Theoretical PhysicsCollective Variables and Their Canonical Conjugate Momenta in Many-Body ProblemKunio YamamotoPublished Apr 1, 1962• 0 citationsPublisherAbstractKunio Yamamoto; Collective Variables and Their Canonical Conjugate Momenta in Many-Body Problem, Progress of Theoretical Physics, Volume 27, Issue 4, 1 April 19DOI10.1143/ptp.27.838