@article{GDZPPN002083841,
title = {Ordered Manifolds, Invariant Cone Fields, and Semigroups.},
journal = {Forum mathematicum},
volume = {1},
year = {1989},
pages = {273-308},
zbl = {0672.53041},
url = {http://dml.mathdoc.fr/item/GDZPPN002083841}
}
LAWSON, JIMMIE D. Ordered Manifolds, Invariant Cone Fields, and Semigroups.. Forum mathematicum, Tome 1 (1989) pp. 273-308. http://gdmltest.u-ga.fr/item/GDZPPN002083841/