@article{MZ_1965__90_170459,
     author = {Spencer E. Dickson},
     title = {Decomposition of modules. {I.} {Classical} rings.},
     journal = {Mathematische Zeitschrift},
     pages = {9--13},
     year = {1965},
     volume = {90},
     zbl = {0154.28404},
     url = {http://geodesic.mathdoc.fr/item/MZ_1965__90_170459/}
}