@article{1102785957, author = {Gerth, Frank}, title = {The Iwasawa invariant $\mu$ for quadratic fields.}, journal = {Pacific J. Math.}, volume = {85}, number = {2}, year = {1979}, pages = { 131-136}, language = {en}, url = {http://dml.mathdoc.fr/item/1102785957} }
Gerth, Frank. The Iwasawa invariant $\mu$ for quadratic fields.. Pacific J. Math., Tome 85 (1979) no. 2, pp. 131-136. http://gdmltest.u-ga.fr/item/1102785957/