@article{ADM_2004_4_a7,
     author = {Robert Wisbauer},
     title = {Correct classes of modules},
     journal = {Algebra and discrete mathematics},
     pages = {106--118},
     publisher = {mathdoc},
     number = {4},
     year = {2004},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/ADM_2004_4_a7/}
}