Liberzon V I

Publications in Math-Net.Ru

1. Nondegenerate operator algebras in spaces with an indefinite metric
   
   Izv. Akad. Nauk SSSR Ser. Mat., 37:3 (1973),  533–538
2. Operator-irreducible symmetric algebras of operators in the $\mathbf\Pi^1$ Pontryagin space
   
   Izv. Akad. Nauk SSSR Ser. Mat., 35:5 (1971),  1159–1170