BOUTET DE MONVEL, A.; MARCHENKO, A.; PASTUR, L. The multistability in the stationary scattering problem for a nonlinear mean-field model. Математическая физика, анализ, геометрия, Харків, Україна, v. 2, n. 3-4, p. 296–305, 1995. Disponível em: https://mag.ilt.kharkiv.ua/index.php/mag/article/view/m02-0296e. Acesso em: 21 лис. 2024.