J. Yang and T.I. Lakoba, "Squared operator methods ...", Stud. Appl. Math. 118, 153-197 (2007)
Fig. 2: a vortex soliton in the 2D NLS equation with periodic potential (135)-(136)
Fig. 3: a gap soliton in the 2D NLS equation with periodic potential (134)
Fig. 5: a ground-state soliton in the 2D second-harmonic-generation equations (142)-(143)
Fig. 6: a dipole-mode vector soliton in the 2D coupled NLS equations with saturable nonlinearity (146)-(147)
Fig. 8: a dissipative soliton in the the Ginzburg-Landau equation (158)