@article{GDZPPN002401258, title = {The Number of Generators of a Module.}, journal = {Mathematische Zeitschrift}, volume = {99}, year = {1967}, pages = {318-322}, zbl = {0156.27403}, url = {http://dml.mathdoc.fr/item/GDZPPN002401258} }
Swan, Richard G. The Number of Generators of a Module.. Mathematische Zeitschrift, Tome 99 (1967) pp. 318-322. http://gdmltest.u-ga.fr/item/GDZPPN002401258/