Yirang Yuan, Qing Yang, Changfeng Li and Tongjun Sun. (2017). A Numerical Approximation Structured by Mixed Finite Element and Upwind Fractional Step Difference for Semiconductor Device with Heat Conduction and Its Numerical Analysis.
            <i>Numerical Mathematics: Theory, Methods and Applications</i>. <i>10</i> (3).
            541-561.
         doi:10.4208/nmtma.2017.y15013