@article{10_14708_cm_v15i1_5710,
     author = {R. W. West},
     title = {Covering spaces revisited},
     journal = {Commentationes Mathematicae},
     pages = { 119--126},
     publisher = {mathdoc},
     volume = {15},
     number = {1},
     year = {1971},
     doi = {10.14708/cm.v15i1.5710},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v15i1.5710/}
}