@article{10_1017_S0017089500002718,
     author = {Chowla, S. and Friedlander, J.},
     title = {Class numbers and quadratic residues},
     journal = {Glasgow mathematical journal},
     pages = {47--52},
     year = {1976},
     volume = {17},
     number = {1},
     doi = {10.1017/S0017089500002718},
     url = {http://geodesic.mathdoc.fr/articles/10.1017/S0017089500002718/}
}