B. R. Judd, 1962, Phys. Rev., 127, 750, 10.1103/PhysRev.127.750
G. S. Ofelt, 1962, J. Chem. Phys., 37, 511, 10.1063/1.1701366
J. D. Axe, 1963, J. Chem. Phys., 39, 1154, 10.1063/1.1734405
W. F. Krupke, 1965, Phys. Rev., 139, A2008, 10.1103/PhysRev.139.A2008
W. T. Carnall, 1965, J. Chem. Phys., 42, 3797, 10.1063/1.1695840
W. F. Krupke, 1966, Phys. Rev., 145, 325, 10.1103/PhysRev.145.325
M. J. Weber, 1967, Phys. Rev., 157, 262, 10.1103/PhysRev.157.262
M. J. Weber, 1967, Optical Properties of Ions in Crystals
M. J. Weber, 1968, J. Chem. Phys., 48, 4774, 10.1063/1.1668061
W. F. Krupke, 1966, IEEE J. Quantum Electron., QE-2, 698, 10.1109/JQE.1966.1073743
W. D. Partlow, 1967, Phys. Rev., 157, 252, 10.1103/PhysRev.157.252
L. A. Riseberg, 1967, Phys. Rev., 159, 262, 10.1103/PhysRev.159.262
L. A. Riseberg, 1967, Phys. Rev. Letters, 19, 423, 10.1103/PhysRevLett.19.1423
N. C. Chang, 1966, J. Chem. Phys., 44, 4044, 10.1063/1.1726571
G. S. Ofelt, 1963, J. Chem. Phys., 38, 2171, 10.1063/1.1733947
P. Kisliuk, 1964, J. Chem. Phys., 40, 3606, 10.1063/1.1725060
J. B. Gruber, 1964, J. Chem. Phys., 41, 3363, 10.1063/1.1725734
N. C. Chang, 1964, J. Chem. Phys., 41, 3227, 10.1063/1.1725701
M. J. Weber, 1967, Phys. Rev., 156, 231, 10.1103/PhysRev.156.231
R. H. Hoskins, 1964, Appl. Phys. Letters, 4, 22, 10.1063/1.1723577
L. G. Van Uitert, 1966, J. Chem. Phys., 44, 3514, 10.1063/1.1727258
V. L. Levshin, 1966, Opt. i Spektroskopiya, 21, 319
V. L. Levshin, 1967, Opt. i Spektroskopiya, 22, 69
G. E. Barasch, 1965, J. Chem. Phys., 43, 988, 10.1063/1.1696882
I. Richman, 1967, Appl. Phys. Letters, 10, 218, 10.1063/1.1754920
N. C. Chang, 1963, J. Appl. Phys., 34, 3500, 10.1063/1.1729247
J. D. Axe, 1964, J. Chem. Phys., 40, 3066, 10.1063/1.1724949
Y. Kobayashi, 1967, Japan J. Appl. Phys., 6, 114, 10.1143/JJAP.6.114
J. R. Chamberlain, 1966, Proc. Phys. Soc. (London), 89, 143, 10.1088/0370-1328/89/1/321
N. T. McDevitt, 1966, J. Opt. Soc. Am., 56, 636, 10.1364/JOSA.56.000636
G. H. Dieke, 1963, Appl. Opt., 2, 675, 10.1364/AO.2.000675
T. Hoshina, 1967, Japan J. Appl. Phys., 6, 1203, 10.1143/JJAP.6.1203
E. Loh, 1966, Phys. Rev., 147, 332, 10.1103/PhysRev.147.332
