[1] V. I. Bespalov, V. I. Talanov. Filamentary structure of light beams in nonlinear liquids. JETP Lett., 3, 307(1966).
[7] S.-C. Wen, D.-Y. Fan. Non-paraxial propagation of optical beams in nonlinear self-focusing media. Chin. J. Lasers, 28, 1066(2001).
[22] F. Bashore, A. Norcross. Optical Coherence and Quantum Optics(1996).