Grant, 1970, Adv. Phys., 19, 747, 10.1080/00018737000101191
Mann, 1970, J. Chem. Phys., 53, 2397, 10.1063/1.1674338
Desclaux, 1971, J. Phys. B, 4, 631, 10.1088/0022-3700/4/5/004
Liberman, 1965, Phys. Rev., 137, A27, 10.1103/PhysRev.137.A27
Cowan, 1967, Phys. Rev., 163, 54, 10.1103/PhysRev.163.54
Froese Fischer, 1972, Computer Phys. Commun., 4, 107, 10.1016/0010-4655(72)90039-2
Mayers, 1957, Proc. R. Soc. Lond. A, 241, 93, 10.1098/rspa.1957.0115
Griffin, 1969, Phys. Rev., 177, 62, 10.1103/PhysRev.177.62
Zalubas, 1968, J. Opt. Soc. Am., 58, 1195, 10.1364/JOSA.58.001195
Kaufman, 1975, J. Opt. Soc. Am., 65, 302, 10.1364/JOSA.65.000302
Kim, 1976, Phys. Rev. Lett., 36, 139, 10.1103/PhysRevLett.36.139
Armstrong, 1976, Phys. Rev. A, 14, 1114, 10.1103/PhysRevA.14.1114