@article{1206130073, author = {Ooishi, Akira}, title = {$\Delta$-genera and sectional genera of commutative rings}, journal = {Hiroshima Math. J.}, volume = {17}, number = {3}, year = {1987}, pages = { 361-372}, language = {en}, url = {http://dml.mathdoc.fr/item/1206130073} }
Ooishi, Akira. $\Delta$-genera and sectional genera of commutative rings. Hiroshima Math. J., Tome 17 (1987) no. 3, pp. 361-372. http://gdmltest.u-ga.fr/item/1206130073/