Hrmova, Renata Relative ideals in semigroups. (English) Zbl 0189.30403 Mat. Čas., Slovensk. Akad. Vied 17, 206-223 (1967). PDFBibTeX XMLCite \textit{R. Hrmova}, Mat. Čas., Slovensk. Akad. Vied 17, 206--223 (1967; Zbl 0189.30403) Full Text: EuDML
Hrmová, Renáta Semigroups in which every proper left ideal is a group. (Slovak) Zbl 0211.04001 Mat.-Fyz. Čas., Slovensk. Akad. Vied 11, 75-79 (1961). MSC: 20M12 PDFBibTeX XMLCite \textit{R. Hrmová}, Mat.-Fyz. Čas., Slovensk. Akad. Vied 11, 75--79 (1961; Zbl 0211.04001)