@article{IM_1985__79_143186,
     author = {Ralph Greenberg},
     title = {On the critical values of {Hecke} {L-functions} for imaginary quadratic fields.},
     journal = {Inventiones mathematicae},
     pages = {79--94},
     publisher = {mathdoc},
     volume = {79},
     year = {1985},
     zbl = {0558.12005},
     url = {http://geodesic.mathdoc.fr/item/IM_1985__79_143186/}
}