@article{MZ_1972__125_171701,
     author = {Robert B. jr. Warfield},
     title = {Rings {Whose} {Modules} {Have} {Nice} {Decompositions.}},
     journal = {Mathematische Zeitschrift},
     pages = {187--192},
     publisher = {mathdoc},
     volume = {125},
     year = {1972},
     zbl = {0218.13012},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__125_171701/}
}