1. G.G. Myasishcheva, Yu.V. Obukhov, V.S. Roganov, and V.G. Firsov, Zh. Eksperim. Teor. Fiz.53 (1967) 451 [English transl. Soviet Phys. JETP26 (1968) 298]
2. I.I. Gurevich, I.G. Ivanter, E.A. Meleshko, B.A. Nikol'skii, V.S. Roganov, V.I. Selivanov, V.P. Smilga, B.V. Sokolov, and V.D. Shestakov, Zh. Eksperim. Teor. Fiz.60 (1971) 471 [English transl. Soviet Phys. JETP33 (1971) 253]
3. I.I. Gurevich, E.A. Meleshko, I.A. Muratova, B.A. Nikol'skii, V.S. Roganov, and V.I. Selivanov. Zh. ETF Pis. Red.18 (1973) 608 [English transl. Soviet Phys. JETP Letters18 (1973) 357]
4. P.W. Percival, E. Roduner, and H. Fischer, Chem. Phys.32 (1978) 353
5. P.W. Percival, J.C. Brodovitch, K.E. Newman, and D.P. Spencer, Chem. Phys. Letters93 (1982) 366