Katsman S I

Publications in Math-Net.Ru

1. Commutative semigroups with lattice of subsemigroups satisfies a nontrivial identity
   
   Mat. Sb. (N.S.), 137(179):4(12) (1988),  462–482
2. Semigroups whose lattice of subsemigroups is a complemented lattice
   
   Sibirsk. Mat. Zh., 15:6 (1974),  1276–1285