@article{PIM_1983_N_S_34_48_a11,
     author = {N. J. Groenewald},
     title = {A {Note} on {Extensions} of {Bear} and {P.p.-rings}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {71 },
     publisher = {mathdoc},
     volume = {_N_S_34},
     number = {48},
     year = {1983},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1983_N_S_34_48_a11/}
}