Giacomo Dimarco, Lorenzo Pareschi and Vittorio Rispoli. (2014). Implicit-Explicit Runge-Kutta Schemes for the Boltzmann-Poisson System for Semiconductors.
            <i>Communications in Computational Physics</i>. <i>15</i> (5).
            1291-1319.
         doi:10.4208/cicp.090513.151113a