@article{bwmeta1.element.bwnjournal-article-aav52i2p103bwm,
author = {Hardy, Kenneth and Williams, Kenneth},
title = {The class number of pairs of positive-definite binary quadratic forms},
journal = {Acta Arithmetica},
volume = {52},
year = {1989},
pages = {103-117},
zbl = {0687.10014},
language = {en},
url = {http://dml.mathdoc.fr/item/bwmeta1.element.bwnjournal-article-aav52i2p103bwm}
}
Hardy, Kenneth; Williams, Kenneth. The class number of pairs of positive-definite binary quadratic forms. Acta Arithmetica, Tome 52 (1989) pp. 103-117. http://gdmltest.u-ga.fr/item/bwmeta1.element.bwnjournal-article-aav52i2p103bwm/