Bertrand P, 1968, Phys. Lett., 28A, 68, 10.1016/0375-9601(68)90606-3
Dougherty J P, 1970, J. Plasma Phys., 4, 61, 10.1017/S0022377800005419
Dysthe K B, 1968, Phys. Lett., 27A, 59, 10.1016/0375-9601(68)91337-6
Dysthe K B, 1974, J. Plasma Phys., 11, 63, 10.1017/S0022377800024478
Fried B D, 1973, J. Phys. Soc. Japan, 34, 1073, 10.1143/JPSJ.34.1073
Ichikawa Y H, 1972, J. Phys. Soc. Japan, 33, 189, 10.1143/JPSJ.33.189
Karpman V I, 1968, Zh. Eksp. Teor. Fiz., 55, 530
Karpman V I, 1969, Soviet Phys. JETP, 28, 277
10.1103/PhysRevLett.31.1482
Pécseli H L, 1975, Phys. Scripta, 11, 311, 10.1088/0031-8949/11/5/013
Pécseli H L, 1975, Plasma Phys., 17, 493, 10.1088/0032-1028/17/6/009
10.1103/PhysRevLett.17.996
Whitham G B, 1965, Proc. R. Soc., 283, 238, 10.1098/rspa.1965.0019
Zakharov V E, 1971, Zh. Eksper. Teor. Fiz., 61, 118
Zakharov V E, 1972, Soviet Phys. JETP, 34, 62