@conference{inp:ADK87, author = "Luis Alvarez and and ", address = "Universitat Augsburg", booktitle = "Colloquium on Free Boundary Problems: Theory and Applications", editor = " K.H.Hoffmann and J.Sprekels", keywords = "ami", title = "{O}n the initial behaviour of the interfaces in nonlinear diffusion convection processes", year = "1987", }