@article{1200694120, author = {Kitamura, Kazuo}, title = {On the free quadratic extensions of a commutative ring}, journal = {Osaka J. Math.}, volume = {10}, number = {1}, year = {1973}, pages = { 15-20}, language = {en}, url = {http://dml.mathdoc.fr/item/1200694120} }
Kitamura, Kazuo. On the free quadratic extensions of a commutative ring. Osaka J. Math., Tome 10 (1973) no. 1, pp. 15-20. http://gdmltest.u-ga.fr/item/1200694120/