@article{Derech_2007, title={Characterization of the semilattice of idempotents of a finite-rank permutable inverse semigroup with zero}, volume={59}, url={https://umj.imath.kiev.ua/index.php/umj/article/view/3394}, abstractNote={We give a characterization of the semilattice of idempotents of a finite-rank permutable inverse semigroup with zero.}, number={10}, journal={Ukrains’kyi Matematychnyi Zhurnal}, author={Derech, V. D.}, year={2007}, month={Oct.}, pages={1353–1362} }