Thiel, Hermann Modules for Goldschmidt amalgams. (Moduln für Goldschmidt-Amalgame.) (German) Zbl 0805.20020 Berlin: FU Berlin, FB 19/Math. 110 S. (1991). Reviewer: S.Heiss (Halle) MSC: 20E06 20C20 20E42 20C33 20D05 05C25 20F65 20G40 20F05 PDFBibTeX XMLCite \textit{H. Thiel}, Moduln für Goldschmidt-Amalgame. Berlin: FU Berlin, FB 19/Math. (1991; Zbl 0805.20020)
Hall, T. E. Regular semigroups: Amalgamation and the lattice of existence varieties. (English) Zbl 0727.20041 Algebra Univers. 28, No. 1, 79-102 (1991). Reviewer: K.Byleen (Milwaukee) MSC: 20M17 20M07 08B15 PDFBibTeX XMLCite \textit{T. E. Hall}, Algebra Univers. 28, No. 1, 79--102 (1991; Zbl 0727.20041) Full Text: DOI