@article{1200693933, author = {Mart\'\i nez, Juan Jos\'e}, title = {The first cohomology group of a commutative ring}, journal = {Osaka J. Math.}, volume = {9}, number = {1}, year = {1972}, pages = { 415-420}, language = {en}, url = {http://dml.mathdoc.fr/item/1200693933} }
Martínez, Juan José. The first cohomology group of a commutative ring. Osaka J. Math., Tome 9 (1972) no. 1, pp. 415-420. http://gdmltest.u-ga.fr/item/1200693933/