Precision Matrix Estimation by Inverse Principal Orthogonal Decomposition. Communications in Mathematical Research, [S. l.], v. 36, n. 1, p. 68–92, 2020. DOI: 10.4208/cmr.2020-0001. Disponível em: https://global-sci.com/index.php/cmr/article/view/9023. Acesso em: 5 dec. 2025.