@article{JOLT_1991_1_2_a9,
     author = {K. H. Hofmann and W. Ruppert},
     title = { Divisible {Subsemigroups} of {Lie} {Groups}},
     journal = {Journal of Lie Theory},
     pages = {205--216},
     year = {1991},
     volume = {1},
     number = {2},
     doi = {10.5802/jolt.21},
     url = {https://jolt.centre-mersenne.org/articles/10.5802/jolt.21/}
}