@article{MZ_1972__124_171676,
     author = {Robert Sandling},
     title = {Note on the {Integral} {Group} {Ring} {Problem.}},
     journal = {Mathematische Zeitschrift},
     pages = {255--258},
     publisher = {mathdoc},
     volume = {124},
     year = {1972},
     zbl = {0221.20005},
     url = {http://geodesic.mathdoc.fr/item/MZ_1972__124_171676/}
}