1.
Shvartsman PA. Generalization of the Lidskii theorem on the localization of the spectrum of a product of Hermitian operators. Ukr. Mat. Zhurn. [Internet]. 1999 Jul. 25 [cited 2025 Dec. 5];51(7):980–988. Available from: https://umj.imath.kiev.ua/index.php/umj/article/view/4687