Li , JichengLi , Wenbo and Liu , Xuenian. (2020). An Adaptive Nonmonotone Projected Barzilai-Borwein Gradient Method with Active Set Prediction for Nonnegative Matrix Factorization.
            <i>Numerical Mathematics: Theory, Methods and Applications</i>. <i>13</i> (2).
            516-538.
         doi:10.4208/nmtma.OA-2019-0028