@article{10_4153_CJM_1969_051_3,
     author = {Watters, J. F.},
     title = {Lower {Radicals} in {Associative} {Rings}},
     journal = {Canadian journal of mathematics},
     pages = {466--476},
     year = {1969},
     volume = {21},
     number = {1},
     doi = {10.4153/CJM-1969-051-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1969-051-3/}
}