@article{01780370,
title = {A combinatorial commutativity property for rings.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {30},
year = {2002},
pages = {525-530},
doi = {10.1155/S0161171202008074},
zbl = {1003.16028},
language = {en},
url = {http://dml.mathdoc.fr/item/01780370}
}
Bell, Howard E.; Klein, Abraham A. A combinatorial commutativity property for rings.. International Journal of Mathematics and Mathematical Sciences, Tome 30 (2002) pp. 525-530. doi : 10.1155/S0161171202008074. http://gdmltest.u-ga.fr/item/01780370/