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@article{IM_1968__5_141909, author = {G.B. SELIGMAN}, title = {On {Some} {Commutative} \"unipotent {Groups.}}, journal = {Inventiones mathematicae}, pages = {129--137}, publisher = {mathdoc}, volume = {5}, year = {1968}, zbl = {0155.05802}, url = {http://geodesic.mathdoc.fr/item/IM_1968__5_141909/} }
G.B. SELIGMAN. On Some Commutative ünipotent Groups.. Inventiones mathematicae, Tome 5 (1968), pp. 129-137. http://geodesic.mathdoc.fr/item/IM_1968__5_141909/