@article{1102905675,
author = {Hartfiel, D. J. and Maxson, C. J.},
title = {A characterization of the maximal monoids and maximal groups in $\beta\_X$.},
journal = {Pacific J. Math.},
volume = {61},
number = {2},
year = {1975},
pages = { 437-444},
language = {en},
url = {http://dml.mathdoc.fr/item/1102905675}
}
Hartfiel, D. J.; Maxson, C. J. A characterization of the maximal monoids and maximal groups in $\beta_X$.. Pacific J. Math., Tome 61 (1975) no. 2, pp. 437-444. http://gdmltest.u-ga.fr/item/1102905675/