@article{GDZPPN001261738, title = {Centralizers in symmetric inverse semigroups: Structure and order.}, journal = {Semigroup forum}, volume = {44}, year = {1992}, pages = {347-355}, zbl = {0746.20046}, url = {http://dml.mathdoc.fr/item/GDZPPN001261738} }
Lipscomb, S.L. Centralizers in symmetric inverse semigroups: Structure and order.. Semigroup forum, Tome 44 (1992) pp. 347-355. http://gdmltest.u-ga.fr/item/GDZPPN001261738/