@article{1029000681, author = {Goldstein, Myron}, title = {The span of a Riemann surface.}, journal = {Michigan Math. J.}, volume = {18}, number = {1}, year = {1971}, pages = { 223-224}, language = {en}, url = {http://dml.mathdoc.fr/item/1029000681} }
Goldstein, Myron. The span of a Riemann surface.. Michigan Math. J., Tome 18 (1971) no. 1, pp. 223-224. http://gdmltest.u-ga.fr/item/1029000681/