TY - JOUR AU - Villarreal, F. TI - Colombeau's theory and shock wave solutions for systems of PDEs JO - Electronic Journal of Differential Equations PY - 2000 VL - 2000 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/EJDE_2000__2000__a119/ LA - en ID - EJDE_2000__2000__a119 ER -