@article{1250523905, author = {Nagata, Masayoshi}, title = {Flatness of an extension of a commutative ring}, journal = {J. Math. Kyoto Univ.}, volume = {9}, number = {3}, year = {1969}, pages = { 439-448}, language = {en}, url = {http://dml.mathdoc.fr/item/1250523905} }
Nagata, Masayoshi. Flatness of an extension of a commutative ring. J. Math. Kyoto Univ., Tome 9 (1969) no. 3, pp. 439-448. http://gdmltest.u-ga.fr/item/1250523905/