@article{JRAM_1991__421_153364,
     author = {Mohan Nair and Alberto Perelli},
     title = {Sieve methods and class-number problems {III.}},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {63--72},
     publisher = {mathdoc},
     volume = {421},
     year = {1991},
     zbl = {0786.11059},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1991__421_153364/}
}