@article{GDZPPN001264648,
title = {Properties of a pair of functions which generate a dense subsemigroup of S(X).},
journal = {Semigroup forum},
volume = {53},
year = {1996},
pages = {101-104},
zbl = {0838.22001},
url = {http://dml.mathdoc.fr/item/GDZPPN001264648}
}
Magill, K.D. jr. Properties of a pair of functions which generate a dense subsemigroup of S(X).. Semigroup forum, Tome 53 (1996) pp. 101-104. http://gdmltest.u-ga.fr/item/GDZPPN001264648/