@article{GDZPPN001255711, title = {Rees products in differentiable semigroups.}, journal = {Semigroup forum}, volume = {24}, year = {1982}, pages = {145-152}, zbl = {0498.22002}, url = {http://dml.mathdoc.fr/item/GDZPPN001255711} }
Holmes, T.P. Rees products in differentiable semigroups.. Semigroup forum, Tome 24 (1982) pp. 145-152. http://gdmltest.u-ga.fr/item/GDZPPN001255711/