@article{GDZPPN001259067,
title = {Differentiable monoids with smooth boundary.},
journal = {Semigroup forum},
volume = {36},
year = {1987},
pages = {211-222},
zbl = {0627.22002},
url = {http://dml.mathdoc.fr/item/GDZPPN001259067}
}
Holmes, J.P. Differentiable monoids with smooth boundary.. Semigroup forum, Tome 36 (1987) pp. 211-222. http://gdmltest.u-ga.fr/item/GDZPPN001259067/