@article{1255988995,
author = {Ullom, Stephen V. and Watt, Stephen B.},
title = {Class number restrictions for certain $l$-extensions of imaginary quadratic fields},
journal = {Illinois J. Math.},
volume = {32},
number = {4},
year = {1988},
pages = { 422-427},
language = {en},
url = {http://dml.mathdoc.fr/item/1255988995}
}
Ullom, Stephen V.; Watt, Stephen B. Class number restrictions for certain $l$-extensions of imaginary quadratic fields. Illinois J. Math., Tome 32 (1988) no. 4, pp. 422-427. http://gdmltest.u-ga.fr/item/1255988995/