@article{02077601, title = {On compactification lattices of subsemigroups of }, journal = {Journal of Lie Theory}, volume = {14}, year = {2004}, pages = {73-109}, zbl = {1062.22017}, language = {en}, url = {http://dml.mathdoc.fr/item/02077601} }
Breckner, Brigitte E.; Ruppert, Wolfgang A.F. On compactification lattices of subsemigroups of . Journal of Lie Theory, Tome 14 (2004) pp. 73-109. http://gdmltest.u-ga.fr/item/02077601/