@article{01621525,
title = {Viscosity solutions of nonlinear systems of degenerated elliptic equations of second order.},
journal = {Zeitschrift f\"ur Analysis und ihre Anwendungen},
volume = {19},
year = {2000},
pages = {927-951},
zbl = {0976.35019},
language = {en},
url = {http://dml.mathdoc.fr/item/01621525}
}
Liu, Weian; Chen, Hua. Viscosity solutions of nonlinear systems of degenerated elliptic equations of second order.. Zeitschrift für Analysis und ihre Anwendungen, Tome 19 (2000) pp. 927-951. http://gdmltest.u-ga.fr/item/01621525/