TY  - JOUR
AU  - Piotr Gwiazda
TI  - An existence result for balance laws
 with multifunctions: a model from the theory
 of granular media
JO  - Colloquium Mathematicum
PY  - 2003
SP  - 67
EP  - 79
VL  - 97
IS  - 1
PB  - mathdoc
UR  - http://geodesic.mathdoc.fr/articles/10.4064/cm97-1-7/
DO  - 10.4064/cm97-1-7
LA  - en
ID  - 10_4064_cm97_1_7
ER  -