@article{EJDE_2003__2003__a161, author = {Sabl\'e-Tougeron, Monique}, title = {Non-classical phase transitions at a sonic point}, journal = {Electronic journal of differential equations}, year = {2003}, volume = {2003}, zbl = {1023.35075}, language = {en}, url = {http://geodesic.mathdoc.fr/item/EJDE_2003__2003__a161/} }