@article{10_14708_cm_v21i1_5972,
     author = {A. Eada},
     title = {A two-point boundary value problem for systems of ordinary non-linear differential equations and the lemma of {Vi\v{s}ik}},
     journal = {Commentationes Mathematicae},
     pages = { 157--161},
     publisher = {mathdoc},
     volume = {21},
     number = {1},
     year = {1980},
     doi = {10.14708/cm.v21i1.5972},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v21i1.5972/}
}