Kohn, 1976, Solid State Commun., 18, 553, 10.1016/0038-1098(76)91479-4
Lau, 1977, Surface Sci., 65, 607, 10.1016/0039-6028(77)90469-1
Grimley, 1967, Proc. Phys. Soc. (London), 90, 751, 10.1088/0370-1328/90/3/320
Grimley, 1967, Proc. Phys. Soc. (London), 92, 776, 10.1088/0370-1328/92/3/329
Grimley, 1969, Surface Sci., 14, 395, 10.1016/0039-6028(69)90087-9
Einstein, 1973, Phys. Rev., B7, 3629, 10.1103/PhysRevB.7.3629
Tsong, 1973, Phys. Rev. Letters, 31, 1207, 10.1103/PhysRevLett.31.1207
Rudnick, 1972, Phys. Rev., B5, 2863, 10.1103/PhysRevB.5.2863
Ruderman, 1954, Phys. Rev., 96, 99, 10.1103/PhysRev.96.99
Lang, 1970, Phys. Rev., B1, 4555, 10.1103/PhysRevB.1.4555
Vashishta, 1972, Phys. Rev., B3, 875, 10.1103/PhysRevB.6.875
Lomer, 1962, Proc. Phys. Soc. (London), 80, 489, 10.1088/0370-1328/80/2/316
Lomer, 1964, Proc. Phys. Soc. (London), 84, 327, 10.1088/0370-1328/84/2/116
Walsh, 1964, Phys. Rev. Letters, 13, 523, 10.1103/PhysRevLett.13.523
Mattheiss, 1965, Phys. Rev., 139, A1893, 10.1103/PhysRev.139.A1893