@article{GDZPPN002362805,
title = {Real Quadratic Number Fields with 2-Class Group of Type (2,2).},
journal = {Mathematica Scandinavica},
volume = {77},
year = {1995},
pages = {161-178},
zbl = {0847.11058},
url = {http://dml.mathdoc.fr/item/GDZPPN002362805}
}
Benjamin, Elliot; Snyder, C. Real Quadratic Number Fields with 2-Class Group of Type (2,2).. Mathematica Scandinavica, Tome 77 (1995) pp. 161-178. http://gdmltest.u-ga.fr/item/GDZPPN002362805/