Kochura, Alexander, Ludmila Podkolzina, Yan Ivakin, and Ivan Nidziev. “Singular Matrix Bundles in a Generalized Symmetric Problem of Eigenvalues”. SPIIRAS Proceedings 3, no. 26 (June 1, 2013): 253-276. Accessed November 12, 2026. https://ia.spcras.ru/index.php/sp/article/view/1705.