Pimentel, B. M.Zimerman, A. H.2022-04-292022-04-291975-11-01Il Nuovo Cimento B Series 11, v. 30, n. 1, p. 43-54, 1975.0369-35541826-9877http://hdl.handle.net/11449/231165Using the «gap equations», we calculate the thermodynamic properties of the models A, B, C considered by Hioe as well as the Dicke model modified by acoustic phonons according to Thompson. © 1975 Società Italiana di Fisica.43-54engArtigo10.1007/BF027214922-s2.0-51649187341