1. Baym G., Pethick C.J.: Ground state properties of magnetically trapped Bose-condensed rubidium gas. Phys. Rev. Lett. 76, 6–9 (1996)
2. Bégout P.: Necessary conditions and sufficient conditions for global existence in the nonlinear Schrödinger equation. Adv. Math. Sci. Appl. 12, 817–829 (2002)
3. Berestycki H., Cazenave T.: Instabilité des états stationnaires dans les équations de Schrödinger et de Klein-Gordon non linéarires. C. R. Acad. Sci. Paris I 293, 489–492 (1981)
4. Caffarelli L., Kohn R., Nirenberg L.: First order interpolation inequalities with weights. Compos. Math. 53, 259–275 (1984)
5. Cazenave, T.: An introduction to nonlinear Schrödinger equations, Textos de Metodos Matematicos, 22, Rio de Janeiro (1989)