[2] Čupona G.:
On some primitive classes of universal algebras. Mat. Vesnik n. S. 3 (18), (1966), 105-108.
MR 0205896
[3] Hoehnke H.-J.:
Über Verallgemeinerungen des Scharbegriffs. Math. Nachr. 38 (1968), 365-382.
MR 0268315 |
Zbl 0169.02701
[4] Pe6aнe Ю. K.: O представлении универсальных алгебр в коммутативных полугруппах. Cu6. Mam. Жypн. 7 (1966), 878-885.
[5] Schmidt J.:
A general existence theorem on partial algebras and its special cases. Colloq. Math. 14 (1966), 73-87.
MR 0184892 |
Zbl 0268.08002
[6] Steinfeld O.:
On a generalization of completely O-simple semigroups. Acta Sci. Math. (Szeged) 28 (1967), 135-145.
MR 0215938 |
Zbl 0189.30402