@article{MZ_1979__165_172807,
     author = {Aderemi O. Kuku},
     title = {SGn of {Orders} and {Group-Rings.}},
     journal = {Mathematische Zeitschrift},
     pages = {291--295},
     publisher = {mathdoc},
     volume = {165},
     year = {1979},
     zbl = {0381.16014},
     url = {http://geodesic.mathdoc.fr/item/MZ_1979__165_172807/}
}