@article{JRAM_1973__260_151310,
     author = {Ezra Brown and Charles J. Parry},
     title = {Class numbers of imaginary qudratic fields having exactly three discriminantal divisors.},
     journal = {Journal f\"ur die reine und angewandte Mathematik},
     pages = {31--34},
     publisher = {mathdoc},
     volume = {260},
     year = {1973},
     zbl = {0273.12006},
     url = {http://geodesic.mathdoc.fr/item/JRAM_1973__260_151310/}
}