@article{3016, author = {V\'azquez, Juan L.}, title = {Symmetrization in nonlinear parabolic equations}, journal = {Portugaliae mathematica}, volume = {41}, year = {1982}, pages = {339-346}, zbl = {0524.35061}, mrnumber = {0766862}, language = {en}, url = {http://dml.mathdoc.fr/item/3016} }
Vázquez, Juan L. Symmetrization in nonlinear parabolic equations. Portugaliae mathematica, Tome 41 (1982) pp. 339-346. http://gdmltest.u-ga.fr/item/3016/