@article{JRAM_1961__207_150484, author = {N. Jacobson}, title = {Some groups of {Transformations} defined by {Jordan} {Algebras.} {III.} {Groups} of {Type} {E61.}}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {61--85}, publisher = {mathdoc}, volume = {207}, year = {1961}, zbl = {0142.26501}, url = {http://geodesic.mathdoc.fr/item/JRAM_1961__207_150484/} }