@article{PORMA_2000__57_1_48535,
     author = {Herzog, G.},
     title = {On quasimonotone increasing systems of ordinary differential equations.},
     journal = {Portugaliae mathematica},
     pages = {35--43},
     year = {2000},
     volume = {57},
     number = {1},
     zbl = {0946.34006},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PORMA_2000__57_1_48535/}
}