Y.-C. Chu,  D.-R. Han,  Y. Cao,  X.-M. He & J. Wang. (1970). An Immersed-Finite-Element Particle-in-Cell Simulation Tool for Plasma Surface Interaction.
            <i>International Journal of Numerical Analysis and Modeling</i>. <i>14</i> (2).
            175-200.
         doi: