The Solvability Conditions for the Inverse Problem of Matrices Positive Semidefinite on a Subspace. Journal of Computational Mathematics, [S. l.], v. 12, n. 1, p. 78–87, 1994. Disponível em: https://global-sci.com/index.php/JCM/article/view/11129. Acesso em: 27 feb. 2026.