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@article{SF_1992__44_1_135162, author = {L. San Martin}, title = {Nonreversibility of subsemigroups of semi-simple {Lie} groups.}, journal = {Semigroup forum}, pages = {376--387}, publisher = {mathdoc}, volume = {44}, number = {1}, year = {1992}, zbl = {0758.22003}, url = {http://geodesic.mathdoc.fr/item/SF_1992__44_1_135162/} }
L. San Martin. Nonreversibility of subsemigroups of semi-simple Lie groups.. Semigroup forum, Tome 44 (1992) no. 1, pp. 376-387. http://geodesic.mathdoc.fr/item/SF_1992__44_1_135162/