@article{PMB_1979____A5_0,
     author = {Gras, Georges},
     title = {Sur les invariants {\guillemotleft}~lambda~{\guillemotright} {d{\textquoteright}Iwasawa} des corps ab\'eliens},
     journal = {Publications math\'ematiques de la Facult\'e des sciences de Besan\c{c}on. Th\'eorie des nombres},
     eid = {5},
     pages = {1--38},
     publisher = {Universit\'e de Besan\c{c}on},
     year = {1979},
     doi = {10.5802/pmb.a-22},
     language = {fr},
     url = {http://www.numdam.org/articles/10.5802/pmb.a-22/}
}