@article{GDZPPN002421550,
title = {Maximal and Minimal Solutions of Elliptic Differential Equations with Discontinuous Non-Linearities.},
journal = {Mathematische Zeitschrift},
volume = {162},
year = {1978},
pages = {239-250},
zbl = {0403.35036},
url = {http://dml.mathdoc.fr/item/GDZPPN002421550}
}
Stuart, Charles A. Maximal and Minimal Solutions of Elliptic Differential Equations with Discontinuous Non-Linearities.. Mathematische Zeitschrift, Tome 162 (1978) pp. 239-250. http://gdmltest.u-ga.fr/item/GDZPPN002421550/