L. R. Testardi, 1965, Phys. Rev. Letters, 15, 250, 10.1103/PhysRevLett.15.250
J. Bardeen, 1961, Progress in Low Temperature Physics
B. W. Batterman, 1964, Phys. Rev. Letters, 13, 390, 10.1103/PhysRevLett.13.390
K. R. Keller, 1966, Phys. Letters, 21, 263, 10.1016/0031-9163(66)90805-5
J. J. Hanak, 1967, Proceedings of the International Conference on Crystal Growth, Boston, Massachusetts, 1966
J. J. Hanak, 1964, RCA Rev., 25, 342
G. N. Kamm, 1964, J. Appl. Phys., 35, 327, 10.1063/1.1713309
M. Greenspan, 1957, American Institute of Physics Handbook
O. L. Anderson, 1963, J. Phys. Chem. Solids, 24, 909, 10.1016/0022-3697(63)90067-2
D. Woodard, 1964, RCA Rev., 25, 393
D. Woodard, 1964, Phys. Rev., 136, A166, 10.1103/PhysRev.136.A166
W. P. Mason, 1956, J. Acoust. Soc. Am., 28, 930, 10.1121/1.1908524
R. E. Love, 1964, Rev. Mod. Phys., 136, 260, 10.1103/RevModPhys.36.260
B. R. Tittman, 1965, Phys. Rev. Letters, 14, 296, 10.1103/PhysRevLett.14.296