Duanmei Zhou, Guoliang Chen, Guoxing Wu & Xiangyun Zhang. (1970). On the Nonlinear Matrix Equation $X^s + A^*F(X)A = Q$ with $S≥ 1$.
            <i>Journal of Computational Mathematics</i>. <i>31</i> (2).
            209-220.
         doi:10.4208/jcm.1210-m4082