@article{00036751, title = {On solvability of mixed monotone operator equations with applications to mixed quasimonotone differential systems involving discontinuities.}, journal = {Journal of Applied Mathematics and Stochastic Analysis}, volume = {5}, year = {1992}, pages = {1-17}, doi = {10.1155/S1048953392000017}, zbl = {0761.47033}, language = {en}, url = {http://dml.mathdoc.fr/item/00036751} }
Heikkilä, S.; Kumpulainen, M.; Lakshmikantham, V. On solvability of mixed monotone operator equations with applications to mixed quasimonotone differential systems involving discontinuities.. Journal of Applied Mathematics and Stochastic Analysis, Tome 5 (1992) pp. 1-17. doi : 10.1155/S1048953392000017. http://gdmltest.u-ga.fr/item/00036751/