Progress of Theoretical PhysicsA New Method for Many-Body Systems in Impure CrystalsHiroshi UeyamaPublished Feb 1, 1969• 0 citationsPublisherAbstractHiroshi Ueyama; A New Method for Many-Body Systems in Impure Crystals, Progress of Theoretical Physics, Volume 41, Issue 2, 1 February 1969, Pages 565–566, httpDOI10.1143/ptp.41.565