Han , YazhouWang , Xiaodong and Zhu , Meijun. (2017). Characterization by Symmetry of Solutions of a Nonlinear Subelliptic Equation on the Heisenberg Group.
            <i>Journal of Mathematical Study</i>. <i>50</i> (1).
            17-27.
         doi:10.4208/jms.v50n1.17.02