@article{10_1017_S0017089500000252,
     author = {Leavitt, W. G.},
     title = {Type {Radicals}},
     journal = {Glasgow mathematical journal},
     pages = {22--29},
     year = {1968},
     volume = {9},
     number = {1},
     doi = {10.1017/S0017089500000252},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500000252/}
}