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@article{CMH_1979__54_139788, author = {P. de de Harpe}, title = {Simplicity of the projective unitary groups defined by simple factors.}, journal = {Commentarii mathematici Helvetici}, pages = {334--346}, publisher = {mathdoc}, volume = {54}, year = {1979}, zbl = {0406.46051}, url = {http://geodesic.mathdoc.fr/item/CMH_1979__54_139788/} }
P. de de Harpe. Simplicity of the projective unitary groups defined by simple factors.. Commentarii mathematici Helvetici, Tome 54 (1979), pp. 334-346. http://geodesic.mathdoc.fr/item/CMH_1979__54_139788/