Qianjun He, Mingquan Wei & Dunyan Yan. (2023). Sharp Bound for the Generalized $m$-Linear $n$-Dimensional Hardy-Littlewood-Pόlya Operator.
            <i>Analysis in Theory and Applications</i>. <i>39</i> (1).
            28-41.
         doi:10.4208/ata.OA-2020-0039