@article{10_4153_CJM_1974_108_3,
     author = {Conrad, Paul},
     title = {The {Additive} {Group} of an f-ring},
     journal = {Canadian journal of mathematics},
     pages = {1157--1168},
     year = {1974},
     volume = {26},
     number = {5},
     doi = {10.4153/CJM-1974-108-3},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1974-108-3/}
}