TY - JOUR AU - Juan Carlos Hernández R. TI - Existence of Weak Entropy Solution for a Symmetric System of Keytz-Kranzer Type JO - Revista colombiana de matematicas PY - 2013 SP - 13 EP - 28 VL - 47 IS - 1 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/RCM_2013_47_1_a1/ ID - RCM_2013_47_1_a1 ER -