1. V. F. Zakharov and A. B. Shabat, “Exact theory of two-dimensional self-focusing and one-dimensional self-modulation of wave in nonlinear media,” Soviet JETP, 34, 62–69 (1972).
2. V. N. Lugovoi and A. M. Prokhorov, “Theory of the propagation of high-power laser radiation in a nonlinear medium,” Sov. Phys. Usp., 16, 658–679 (1974).
3. J. J. Rasmussen and K. Rypdal, “Blow-up in nonlinear Schrödinger equations-I. A general review,” Phys. Scr., 33, 481–497 (1986); “Blow-up in nonlinear Schrödinger equations-II. Similarity structure of the blow-up singularity,” 498–504.
4. Sh. M. Nasibov, “On stability, collapse, decay, and self-trapping of solutions of a nonlinear Schrödinger equation,” Sov. Math. Dokl., 32, 784–788 (1985).
5. Sh. M. Nasibov, “On optimal constants in some Sobolev inequalities and their application to a nonlinear Schrödinger equation,” Sov. Math. Dokl., 40, 110–115 (1990).