@article{bwmeta1.element.bwnjournal-article-aav22i4p449bwm,
author = {Craig, Maurice},
title = {A type of class group for imaginary quadratic fields},
journal = {Acta Arithmetica},
volume = {22},
year = {1973},
pages = {449-459},
zbl = {0227.12003},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav22i4p449bwm}
}
Craig, Maurice. A type of class group for imaginary quadratic fields. Acta Arithmetica, Tome 22 (1973) pp. 449-459. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav22i4p449bwm/