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@article{JRAM_1976__281_151684, author = {Erich W. Ellers}, title = {The length of a unitary transformation for characteristic 2.}, journal = {Journal f\"ur die reine und angewandte Mathematik}, pages = {6--12}, publisher = {mathdoc}, volume = {281}, year = {1976}, zbl = {0324.20055}, url = {http://geodesic.mathdoc.fr/item/JRAM_1976__281_151684/} }
Erich W. Ellers. The length of a unitary transformation for characteristic 2.. Journal für die reine und angewandte Mathematik, Tome 281 (1976), pp. 6-12. http://geodesic.mathdoc.fr/item/JRAM_1976__281_151684/