CarRa-p

R. Carles, J. Rauch, Focusing of spherical nonlinear pulses in R^{1+3} III. Sub and supercritical cases, preprint.

R. Carles, J. Rauch. Focusing of spherical nonlinear pulses in $R\sp {1+3}$. III. Sub and supercritical cases.. Tohoku Math. J. (2), 56 (2004), 393--410. MathSciNet, arXiv.