CoKeStTkTa2003c

J. Colliander, M. Keel, G. Staffilani, H. Takaoka, T. Tao. Polynomial growth and orbital instability bounds for $L^2$-subcritical NLS below the energy norm. Commun. Pure Appl, 2 (2003), 33-50. MathSciNet, arXiv.