@article{10_4153_CMB_1974_040_9,
     author = {Formanek, Edward},
     title = {A {Problem} of {Herstein} on {Group} {Rings}},
     journal = {Canadian mathematical bulletin},
     pages = {201--202},
     year = {1974},
     volume = {17},
     number = {2},
     doi = {10.4153/CMB-1974-040-9},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1974-040-9/}
}