Eric Hernández Sastoque, Christian Klingenberg, Leonardo Rendón & Juan C. Juajibioy. (2019). Regularity of Viscous Solutions for a Degenerate Non-linear Cauchy Problem.
            <i>Journal of Partial Differential Equations</i>. <i>29</i> (1).
            14-21.
         doi:10.4208/jpde.v29.n1.2