@article{IM_1994__116_1-3_144188,
     author = {Robert L. Jr. Griess and A.J.E. Ryba},
     title = {Embeddings of {U3} (8), {Sz} (8) and the {Rudvalis} group in algebraic groups of type {E7.}},
     journal = {Inventiones mathematicae},
     pages = {215--242},
     publisher = {mathdoc},
     volume = {116},
     number = {1-3},
     year = {1994},
     zbl = {0796.20014},
     url = {http://geodesic.mathdoc.fr/item/IM_1994__116_1-3_144188/}
}