Eduardo M. Garau, Pedro Morin and Carlos Zuppa. (2012). Quasi-Optimal Convergence Rate of an AFEM for Quasi-Linear Problems of Monotone Type.
            <i>Numerical Mathematics: Theory, Methods and Applications</i>. <i>5</i> (2).
            131-156.
         doi:10.4208/nmtma.2012.m1023