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@article{PORMA_2000__57_1_48535, author = {Herzog, G.}, title = {On quasimonotone increasing systems of ordinary differential equations.}, journal = {Portugaliae mathematica}, pages = {35--43}, publisher = {mathdoc}, volume = {57}, number = {1}, year = {2000}, zbl = {0946.34006}, language = {en}, url = {http://geodesic.mathdoc.fr/item/PORMA_2000__57_1_48535/} }
Herzog, G. On quasimonotone increasing systems of ordinary differential equations.. Portugaliae mathematica, Tome 57 (2000) no. 1, pp. 35-43. http://geodesic.mathdoc.fr/item/PORMA_2000__57_1_48535/