RABANOVICH, V. I. Decomposition of a Hermitian matrix into a sum of a fixed number of orthoprojections. Ukrains’kyi Matematychnyi Zhurnal, [S. l.], v. 72, n. 5, p. 679–693, 2020. DOI: 10.37863/umzh.v72i5.2378. Disponível em: https://umj.imath.kiev.ua/index.php/umj/article/view/2378. Acesso em: 8 dec. 2025.