@article{IM_1980__59_142740,
     author = {Kenneth A. Ribet and Pierre Deligne},
     title = {Values of {Abelian} {L-functions} at {Negative} {Integers} over {Totally} {Real} {Fields.}},
     journal = {Inventiones mathematicae},
     pages = {227--286},
     publisher = {mathdoc},
     volume = {59},
     year = {1980},
     zbl = {0434.12009},
     url = {http://geodesic.mathdoc.fr/item/IM_1980__59_142740/}
}