@article{10_4153_CMB_1980_034_4,
     author = {Gr\"unenfelder, L. and Parmenter, M. M.},
     title = {Isomorphic {Group} {Rings} with {Non-Isomorphic} {Coefficient} {Rings*}},
     journal = {Canadian mathematical bulletin},
     pages = {245--246},
     year = {1980},
     volume = {23},
     number = {2},
     doi = {10.4153/CMB-1980-034-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1980-034-4/}
}