Levi, Inessa Congruences on \(S(\alpha,\beta,\sigma,| X|)\). (English) Zbl 0810.20050 Simon Stevin 67, Suppl., 87-97 (1993). Reviewer: J.Duda (Brno) MSC: 20M20 08A30 20M15 06B15 PDFBibTeX XMLCite \textit{I. Levi}, Simon Stevin 67, 87--97 (1993; Zbl 0810.20050)
Imaoka, Teruo; Okamoto, Yosuke Characterization of \({\mathcal P}\)-congruences on \({\mathcal P}\)-regular semigroups. (English) Zbl 0796.20051 Math. Jap. 38, No. 5, 889-895 (1993). Reviewer: M.Yamada (Matsue / Shimane) MSC: 20M10 20M17 20M15 08A30 PDFBibTeX XMLCite \textit{T. Imaoka} and \textit{Y. Okamoto}, Math. Japon. 38, No. 5, 889--895 (1993; Zbl 0796.20051)