@article{GDZPPN001259520, title = {Hereditary radicals and 0-bands of semigroups.}, journal = {Semigroup forum}, volume = {38}, year = {1989}, pages = {57-76}, zbl = {0661.20043}, url = {http://dml.mathdoc.fr/item/GDZPPN001259520} }
Kelarev, A.V. Hereditary radicals and 0-bands of semigroups.. Semigroup forum, Tome 38 (1989) pp. 57-76. http://gdmltest.u-ga.fr/item/GDZPPN001259520/