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@article{MAN_1989__283_1_164509, author = {Werner Meyer and Wolfram Neutsch}, title = {A {Root} {System} for the {Lyons} {Group.}}, journal = {Mathematische Annalen}, pages = {285--300}, publisher = {mathdoc}, volume = {283}, number = {1}, year = {1989}, zbl = {0642.20015}, url = {http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164509/} }
Werner Meyer; Wolfram Neutsch. A Root System for the Lyons Group.. Mathematische Annalen, Tome 283 (1989) no. 1, pp. 285-300. http://geodesic.mathdoc.fr/item/MAN_1989__283_1_164509/