@article{10_4153_CJM_1998_050_4,
     author = {Elder, G. Griffith},
     title = {Galois {Module} {Structure} of {Ambiguous} {Ideals} in {Biquadratic} {Extensions}},
     journal = {Canadian journal of mathematics},
     pages = {1007--1047},
     year = {1998},
     volume = {50},
     number = {5},
     doi = {10.4153/CJM-1998-050-4},
     url = {http://geodesic.mathdoc.fr/articles/10.4153/CJM-1998-050-4/}
}