@article{GDZPPN001255983, title = {Monoids on a M\"obius band.}, journal = {Semigroup forum}, volume = {26}, year = {1983}, pages = {111-116}, zbl = {0515.22004}, url = {http://dml.mathdoc.fr/item/GDZPPN001255983} }
Castellano, M. Monoids on a Möbius band.. Semigroup forum, Tome 26 (1983) pp. 111-116. http://gdmltest.u-ga.fr/item/GDZPPN001255983/