Commutators in model spaces
V. V. Kapustin

References
1.	V. V. Peller, “Operatory Gankelya v teorii vozmuschenii unitarnykh i samosopryazhennykh operatorov”, Funktsionalnyi analiz i ego prilozheniya, 19:2 (1985), 37–51
2.	M. Sh. Birman, M. Z. Solomyak, “Double operator integrals in a Hilbert space”, Integral Equations Operator Theory, 47:2 (2003)