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@article{SF_1981__23_134527, author = {K.H. Hofmann and J.D. Lawson}, title = {The local theory of semigroups in nilpotent {Lie} groups.}, journal = {Semigroup forum}, pages = {343--358}, publisher = {mathdoc}, volume = {23}, year = {1981}, zbl = {0531.22002}, url = {http://geodesic.mathdoc.fr/item/SF_1981__23_134527/} }
K.H. Hofmann; J.D. Lawson. The local theory of semigroups in nilpotent Lie groups.. Semigroup forum, Tome 23 (1981), pp. 343-358. http://geodesic.mathdoc.fr/item/SF_1981__23_134527/