In this paper we consider band compositions determined by two transitive systems of monomorphisms, called the sturdy bands of semigroups.
@article{urn:eudml:doc:42353, title = {Sturdy bands of semigroups.}, journal = {Collectanea Mathematica}, volume = {41}, year = {1990}, pages = {189-195}, zbl = {0758.20017}, mrnumber = {MR1163901}, language = {en}, url = {http://dml.mathdoc.fr/item/urn:eudml:doc:42353} }
Ciric, Miroslav; Bogdanovic, Stojan. Sturdy bands of semigroups.. Collectanea Mathematica, Tome 41 (1990) pp. 189-195. http://gdmltest.u-ga.fr/item/urn:eudml:doc:42353/