W. F. Brinkman, 1973, Phys. Rev. B, 7, 1508, 10.1103/PhysRevB.7.1508
M. Combescot, 1972, J. Phys. C, 5, 2369, 10.1088/0022-3719/5/17/014
Y. Pokrovsky, 1972, Proceedings of the Eleventh International Conference on the Physics of Semiconductors, Warsaw, 1972
C. Benoít à la Guillaume, 1972, Phys. Rev. B, 5, 3079, 10.1103/PhysRevB.5.3079
J. C. Hensel, 1973, Phys. Rev. Lett., 30, 227, 10.1103/PhysRevLett.30.227
C. Benoít à la Guillaume, 1973, Solid State Commun., 12, 1257, 10.1016/0038-1098(73)90859-4
T. K. Lo, 1973, Phys. Rev. Lett., 31, 224, 10.1103/PhysRevLett.31.224
G. A. Thomas, 1973, Phys. Rev. Lett., 31, 386, 10.1103/PhysRevLett.31.386
J. C. McGroddy, 1973, Solid State Commun., 13, 1801, 10.1016/0038-1098(73)90733-3
E. R. Johnson, 1954, Phys. Rev., 95, 560, 10.1103/PhysRev.95.560
R. Braunstein, 1958, Phys. Rev., 109, 695, 10.1103/PhysRev.109.695
E. Gross, 1972, Fiz. Tverd. Tela, 14, 2004
Y. E. Pokrovskii, 1972, Fiz. Tverd. Tela, 14, 3306
C. Benoit à la Guillaume, 1971, Phys. Rev. Lett., 27, 1214, 10.1103/PhysRevLett.27.1214
P. J. Dean, 1966, Phys. Rev., 150, 690, 10.1103/PhysRev.150.690
D. W. Feldman, 1966, Phys. Rev. Lett., 17, 1209, 10.1103/PhysRevLett.17.1209
M. A. Renucci, 1971, Proceedings of the International Conference on Light Scattering in Solids, Paris, 1971
W. J. Byra, 1973, Solid State Commun., 12, 253, 10.1016/0038-1098(73)90692-3
V. I. Safarov, 1972, Fiz. Tverd. Tela, 14, 458
R. J. Elliott, 1957, Phys. Rev., 108, 1384, 10.1103/PhysRev.108.1384
D. Stroud, 1970, Phys. Rev. B, 8, 3197, 10.1103/PhysRevB.2.3197
R. A. Logan, 1964, Phys. Rev., 136, 1751, 10.1103/PhysRev.136.A1751
J. R. Haynes, 1966, Phys. Rev. Lett., 17, 860, 10.1103/PhysRevLett.17.860
C. Benoít à la Guillaume, 1973, Phys. Rev. B, 7, 1723, 10.1103/PhysRevB.7.1723
M. Combescot, 1974, Phys. Rev. Lett., 32, 15, 10.1103/PhysRevLett.32.15
C. Benoít à la Guillaume, 1973, Solid State Commun., 11, 1585, 10.1016/0038-1098(72)90524-8
E. A. Bobrova, 1971, Fiz. Tverd. Tela, 13, 3528
L. Huldt, 1971, Phys. Status Solidi A, 8, 173, 10.1002/pssa.2210080118
J. D. Cuthbert, 1970, Phys. Rev. B, 1, 1552, 10.1103/PhysRevB.1.1552
R. Conradt, 1972, Solid State Commun., 10, 321, 10.1016/0038-1098(72)90016-6
J. D. Beck, 1973, Solid State Commun., 13, 93, 10.1016/0038-1098(73)90075-6
N. G. Nilsson, 1972, Solid State Commun., 11, 155, 10.1016/0038-1098(72)91151-9
