@article{GDZPPN001254669, title = {Regular 4-spiral semigroup, I.G. semigroups and the Rees construction.}, journal = {Semigroup forum}, volume = {23}, year = {1981}, pages = {97-100}, zbl = {0463.20043}, url = {http://dml.mathdoc.fr/item/GDZPPN001254669} }
Byleen, K. Regular 4-spiral semigroup, I.G. semigroups and the Rees construction.. Semigroup forum, Tome 23 (1981) pp. 97-100. http://gdmltest.u-ga.fr/item/GDZPPN001254669/