S. Lajos

On Characterization of Regular Semigroups

S. Lajos, S. Lajos, 1968 .

Note on Semigroups, which are Semilattices of Groups

S. Lajos, S. Lajos, 1968 .

Characterizations of strongly regular rings

S. Lajos, F. Szász, F. Szász, 1970 .