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Number of items: **3**.

Berezanskii, Yu. M. and Ostrovskii, V. L. and Samoilenko, Yu. S.
(1988)
*Expansion in eigenfunctions of families of commuting operators, and representations of commutation relations.*
Ukrain. Mat. Zh., 40
(1).
pp. 106-109.

Ostrovskii, V. L.
(1988)
*A structure theorem for a pair of unbounded selfadjoint operators connected with a quadratic relation.*
In:
Boundary value problems for differential equations (Russian).
Akad. Nauk Ukrain. SSR, Inst. Mat., Kiev, pp. 89-91.

Ostrovskii, V. L. and Samoilenko, Yu. S.
(1988)
*Application of the projection spectral theorem to noncommuting families of operators.*
Ukrain. Mat. Zh., 40
(4).
pp. 469-481.