@article{1077375081,
author = {Horne, Jr., J. G.},
title = {The boundary of a one-parameter group in a semigroup},
journal = {Duke Math. J.},
volume = {31},
number = {1},
year = {1964},
pages = { 109-117},
language = {en},
url = {http://dml.mathdoc.fr/item/1077375081}
}
Horne, Jr., J. G. The boundary of a one-parameter group in a semigroup. Duke Math. J., Tome 31 (1964) no. 1, pp. 109-117. http://gdmltest.u-ga.fr/item/1077375081/