@article{10_4153_CMB_1970_094_8,
     author = {Williams, Kenneth S.},
     title = {Integers of {Biquadratic} {Fields}},
     journal = {Canadian mathematical bulletin},
     pages = {519--526},
     year = {1970},
     volume = {13},
     number = {4},
     doi = {10.4153/CMB-1970-094-8},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CMB-1970-094-8/}
}