1. Operators in Functional Spaces and Questions of Function Theory, Kiev;VE Katsnelson,1987
2. A.Ya. KheifetsParseval equality in abstract interpolation problem and coupling of open systems (I)Teor. Funk., Funk. Anal. i ikh Prilozhen, 49 (1988) 112–120, Russian. English transl.: J. Sov. Math. 49, 4 (1990) 1114–1120.
3. A.Ya. KheifetsParseval equality in abstract interpolation problem and coupling of open systems (II)Teor. Funk., Funk Anal. I ikh Prilozhen, 50 (1988) 98–103, Russian. English transi.: J. Sov. Math. 49, 6 (1990) 1307–1310.
4. A. KheifetsScattering matrices and Parseval equality in Abstract Interpolation problemPh.D. Thesis, Kharkov State University, 1990.
5. Operator Theory: Advances and Applications;AYa Kheifets,1994