@article{GDZPPN00126043X,
title = {Strongly differentiable monoids with smooth boundary.},
journal = {Semigroup forum},
volume = {40},
year = {1990},
pages = {363-378},
zbl = {0699.22003},
url = {http://dml.mathdoc.fr/item/GDZPPN00126043X}
}
Anderson, M. Strongly differentiable monoids with smooth boundary.. Semigroup forum, Tome 40 (1990) pp. 363-378. http://gdmltest.u-ga.fr/item/GDZPPN00126043X/