%0 Journal Article
%A Hans Wilhelm Alt
%A C J van Duijn
%T A free boundary problem involving a cusp: breakthrough of salt water
%J Interfaces and free boundaries
%D 2000
%P 21-72
%V 2
%N 1
%U http://geodesic.mathdoc.fr/articles/10.4171/ifb/12/
%R 10.4171/ifb/12
%F 10_4171_ifb_12