@article{AIHPC_2008__25_5_865_0, author = {Denzler, Jochen and McCann, Robert J.}, title = {Nonlinear diffusion from a delocalized source : affine self-similarity, time reversal, & nonradial focusing geometries}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {865--888}, publisher = {Elsevier}, volume = {25}, number = {5}, year = {2008}, doi = {10.1016/j.anihpc.2007.05.002}, mrnumber = {2457815}, zbl = {1146.76053}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.anihpc.2007.05.002/} }