@article{10_4171_dm_405,
     author = {Vladimir Chernousov and Alberto Elduque and Max-Albert Knus and Jean-Pierre Tignol},
     title = {Algebraic groups of type $D_4$, triality, and composition algebras.},
     journal = {Documenta mathematica},
     pages = {413--468},
     year = {2013},
     volume = {18},
     doi = {10.4171/dm/405},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/dm/405/}
}