@article{10_4064_ap_34_3_317_324,
     author = {V. Lakshmikantham and A. Richard Mitchell and Roger W. Mitchell},
     title = {Maximal and minimal solutions and comparison results for differential equations in abstract cones},
     journal = {Annales Polonici Mathematici},
     pages = {317--324},
     publisher = {mathdoc},
     volume = {34},
     number = {3},
     year = {1977},
     doi = {10.4064/ap-34-3-317-324},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-34-3-317-324/}
}