@article{GDZPPN002482924,
title = {On Free Quadratic Extensions of Rings.},
journal = {Monatshefte f\"ur Mathematik},
volume = {91},
year = {1981},
pages = {323-328},
zbl = {0461.16008},
url = {http://dml.mathdoc.fr/item/GDZPPN002482924}
}
Szeto, George; Wong, Yuen-Fat. On Free Quadratic Extensions of Rings.. Monatshefte für Mathematik, Tome 91 (1981) pp. 323-328. http://gdmltest.u-ga.fr/item/GDZPPN002482924/