@article{CMUC_1977__18_3_a2,
     author = {Stratton, A. E. and Webb, M. C.},
     title = {The nilpotency of torsion-free rings with given type set},
     journal = {Commentationes Mathematicae Universitatis Carolinae},
     pages = {437--444},
     publisher = {mathdoc},
     volume = {18},
     number = {3},
     year = {1977},
     mrnumber = {0460490},
     zbl = {0383.20039},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/CMUC_1977__18_3_a2/}
}