@article{10_4064_ap_11_1_49_74,
     author = {C. Olech},
     title = {On the asymptotic coincidence of sets filled up by integrals of two systems of ordinary differential equations},
     journal = {Annales Polonici Mathematici},
     pages = {49--74},
     publisher = {mathdoc},
     volume = {11},
     number = {1},
     year = {1961},
     doi = {10.4064/ap-11-1-49-74},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.4064/ap-11-1-49-74/}
}