@article{PIM_1986_N_S_39_53_a12,
     author = {Elbert M. Pirtle},
     title = {Noncommutative {Valuation} {Rings}},
     journal = {Publications de l'Institut Math\'ematique},
     pages = {83 },
     publisher = {mathdoc},
     volume = {_N_S_39},
     number = {53},
     year = {1986},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/PIM_1986_N_S_39_53_a12/}
}