@article{MAN_1985__271_163950,
     author = {Eduardo Friedman},
     title = {Iwasawa {Invariants.}},
     journal = {Mathematische Annalen},
     pages = {13--30},
     publisher = {mathdoc},
     volume = {271},
     year = {1985},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/MAN_1985__271_163950/}
}