TY - RPRT TI - On the Solution of ℓ 0 -Constrained Sparse Inverse Covariance Estimation Problems AU - Phan, Dzung T. AU - Menickelly, Matt PY - 2020 DO - 10.1287/ijoc.2020.0991 UR - https://www.osti.gov/biblio/1839067 ID - 1839067 ER -