$\ell_{0}$ Penalized Maximum Likelihood Estimation of Sparse Covariance Matrices.

Ghania Fatima Petre Stoica Prabhu Babu $\ell_{0}$ Penalized Maximum Likelihood Estimation of Sparse Covariance Matrices. 66-70 2025 32 IEEE Signal Process. Lett. https://doi.org/10.1109/LSP.2024.3495576 db/journals/spl/spl32.html#FatimaSB25 streams/journals/spl