@article{03753023,
title = {On free ring extensions of degree n.},
journal = {International Journal of Mathematics and Mathematical Sciences},
volume = {4},
year = {1981},
pages = {703-709},
doi = {10.1155/S0161171281000537},
zbl = {0479.16002},
language = {en},
url = {http://dml.mathdoc.fr/item/03753023}
}
Szeto, George. On free ring extensions of degree n.. International Journal of Mathematics and Mathematical Sciences, Tome 4 (1981) pp. 703-709. doi : 10.1155/S0161171281000537. http://gdmltest.u-ga.fr/item/03753023/