@article{10_14708_cm_v19i2_5866,
     author = {Z. Polniakowski},
     title = {On some linear differential equations},
     journal = {Commentationes Mathematicae},
     pages = { 323--341},
     publisher = {mathdoc},
     volume = {19},
     number = {2},
     year = {1977},
     doi = {10.14708/cm.v19i2.5866},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v19i2.5866/}
}