RabanovychV. I. (2015) “On Decompositions of a Scalar Operator into a Sum of Self-Adjoint Operators with Finite Spectrum”, Ukrains’kyi Matematychnyi Zhurnal, 67(5), pp. 701–716. Available at: https://umj.imath.kiev.ua/index.php/umj/article/view/2016 (Accessed: 24November2024).