@article{GDZPPN001181335, title = {A Particle Method for First-order Symmetric Systems.}, journal = {Numerische Mathematik}, volume = {55}, year = {1987}, pages = {323-352}, zbl = {0625.65084}, url = {http://dml.mathdoc.fr/item/GDZPPN001181335} }
Raviart, P.A.; Mas-Gallic, S. A Particle Method for First-order Symmetric Systems.. Numerische Mathematik, Tome 55 (1987) pp. 323-352. http://gdmltest.u-ga.fr/item/GDZPPN001181335/