Wang, Shou-Feng. “A Construction of Regular Semigroups With Quasiideal Regular *-Transversals”. Ukrains’kyi Matematychnyi Zhurnal 68, no. 11 (November 25, 2016): 1552–1560. Accessed December 5, 2025. https://umj.imath.kiev.ua/index.php/umj/article/view/1941.