@article{PMIHES_1993__77__63_0,
     author = {Lam, Tsit Yuen and Leep, David B. and Tignol, Jean-Pierre},
     title = {Biquaternion algebras and quartic extensions},
     journal = {Publications Math\'ematiques de l'IH\'ES},
     pages = {63--102},
     publisher = {Institut des Hautes \'Etudes Scientifiques},
     volume = {77},
     year = {1993},
     mrnumber = {1249170},
     zbl = {0801.11048},
     language = {en},
     url = {http://archive.numdam.org/item/PMIHES_1993__77__63_0/}
}