Shao , NianZhang , RuiSun , Jie and Chen , Wenbin. (2023). A Two-Level Simultaneous Orthogonal Matching Pursuit Algorithm for Simultaneous Sparse Approximation Problems.
            <i>CSIAM Transactions on Applied Mathematics</i>. <i>4</i> (4).
            758-775.
         doi:10.4208/csiam-am.SO-2022-0050