1. A1. Aizenstat, A.Ja.,On the isotone transformation semigroup of a finite linearly ordered set, Uspehi Matem. Nauk16 (1961), No 2 (Russian).
2. A2. —,On homomorphisms of endomorphism semigroups of ordered sets, Uč. Zap. Leningrad. Gos. Ped. Inst.238 (1962). 38–48 (Russian).
3. A3. —,On a semisimplicity of an endomorphism semigroup of an ordered set, Doklady Acad. Nauk142 (1962), No. 1, 9–11 (Russian)
4. A4. —,Generating relations of an endomorphism semigroup of a finite linearly ordered set, Sibir. Mat. Z.3 (1962), No. 2, 161–169 (Russian).
5. A5. Aizenstat, A.Ja.,On endomorphism semigroups with the only main ideal chain, Upshehi Matem. Nauk4 (1963), No 2 (Russian).