@article{10_14708_cm_v24i2_6093,
     author = {L. Drewnowski},
     title = {Some characterizations of {semi-Fredholm} operators},
     journal = {Commentationes Mathematicae},
     pages = { 215--218},
     publisher = {mathdoc},
     volume = {24},
     number = {2},
     year = {1984},
     doi = {10.14708/cm.v24i2.6093},
     language = {pl},
     url = {http://geodesic.mathdoc.fr/articles/10.14708/cm.v24i2.6093/}
}