@article{01780279,
title = {On zero subrings and periodic subrings.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {25},
year = {2001},
pages = {413-417},
doi = {10.1155/S0161171201006044},
zbl = {1002.16013},
language = {en},
url = {http://dml.mathdoc.fr/item/01780279}
}
Bell, Howard E. On zero subrings and periodic subrings.. International Journal of Mathematics and Mathematical Sciences, Tome 25 (2001) pp. 413-417. doi : 10.1155/S0161171201006044. http://gdmltest.u-ga.fr/item/01780279/