Schwarz, Štefan A theorem on normal semigroups. (English) Zbl 0098.01704 Czech. Math. J. 10(85), 197-200 (1960). Reviewer: L. Lesieur MSC: 20M10 × Cite Format Result Cite Review PDF Full Text: DOI EuDML
Schwarz, Štefan On dual semigroups. (English) Zbl 0098.01602 Czech. Math. J. 10(85), 201-230 (1960). Reviewer: L. Lesieur MSC: 20M10 × Cite Format Result Cite Review PDF Full Text: DOI EuDML