DAULETBAY, B. N. Spectral theorem in the form of M. V. Keldysh for an arbitrary linear operator in a finite-dimensional space. Journal of Mathematics, Mechanics and Computer Science, [S. l.], v. 107, n. 3, p. 10–19, 2020. DOI: 10.26577/JMMCS.2020.v107.i3.02. Disponível em: https://bm.kaznu.kz/index.php/kaznu/article/view/779. Acesso em: 22 jul. 2024.