Tarik Berroug Hua Ding Rabah Labbas Boubaker-Khaled Sadallah On a degenerate parabolic problem in Hölder spaces. 811-833 2005 162 Applied Mathematics and Computation 2 http://dx.doi.org/10.1016/j.amc.2002.11.001 db/journals/amc/amc162.html#BerrougDLS05