@article{10_4064_ap_10_3_253_271,
     author = {W. Mlak},
     title = {Note on abstract differential inequalities and {Chaplighin} method},
     journal = {Annales Polonici Mathematici},
     pages = {253--271},
     publisher = {mathdoc},
     volume = {10},
     number = {3},
     year = {1961},
     doi = {10.4064/ap-10-3-253-271},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-10-3-253-271/}
}