@article{100403,
author = {\v Stefan Schwarz},
title = {A theorem on normal semigroups},
journal = {Czechoslovak Mathematical Journal},
volume = {10},
year = {1960},
pages = {197-200},
zbl = {0098.01704},
mrnumber = {0116075},
language = {en},
url = {http://dml.mathdoc.fr/item/100403}
}
Schwarz, Štefan. A theorem on normal semigroups. Czechoslovak Mathematical Journal, Tome 10 (1960) pp. 197-200. http://gdmltest.u-ga.fr/item/100403/
K teoriji hausdorfovych bikompaktnych polugrupp, (russian), Czechoslovak Math. J. 5 (80), 1955, 1-23. (1955) | MR 0074769