@article{IM_1987__88_143442,
     author = {K. Horie},
     title = {A note on basic {Iwasawa} ?-invariants of imaginary quadratic fields.},
     journal = {Inventiones mathematicae},
     pages = {31--38},
     publisher = {mathdoc},
     volume = {88},
     year = {1987},
     zbl = {0585.12004},
     url = {http://geodesic.mathdoc.fr/item/IM_1987__88_143442/}
}