@article{GDZPPN001256564,
title = {The a-bicyclic semigroup as a topological semigroup.},
journal = {Semigroup forum},
volume = {30},
year = {1984},
pages = {265-272},
zbl = {0531.22003},
url = {http://dml.mathdoc.fr/item/GDZPPN001256564}
}
Hogan, J.W. The a-bicyclic semigroup as a topological semigroup.. Semigroup forum, Tome 30 (1984) pp. 265-272. http://gdmltest.u-ga.fr/item/GDZPPN001256564/