@article{GDZPPN001250477, title = {Compact normal bands of groups.}, journal = {Semigroup forum}, volume = {11}, year = {1975}, pages = {67-75}, zbl = {0303.22001}, url = {http://dml.mathdoc.fr/item/GDZPPN001250477} }
Hays, T.E. Compact normal bands of groups.. Semigroup forum, Tome 11 (1975) pp. 67-75. http://gdmltest.u-ga.fr/item/GDZPPN001250477/