On left (resp. right) duo regular poe-semigroups
Regular left (right) duo poe-semigroups are characterized in terms of left, right, bi-, and quasi-ideal elements. Some earlier results due to N. Kuroki resp. S. Lajos are starting points of the author's investigation. For further related results, see this reviewer [Mat. Vesn. 8(23), 315-316 (1971; Zbl 0232.20123); ibid. 9(24), 363-364 (1972; Zbl 0241.20052); ibid. 11(26), 125-126 (1974; Zbl 0278.20060), and Elem. Math. 27, 86-87 (1972; Zbl 0214.035)].
scientific article; zbMATH DE number 3875352