Global solvability for a class of quasilinear parabolic problems Alkis Tersenov 35K2035B45parabolic problemsa priori estimatesBernstein's condition Indiana University Mathematics Journal 2001 text pdf 10.1512/iumj.2001.50.2067 10.1512/iumj.2001.50.2067 en Indiana Univ. Math. J. 50 (2001) 1899 - 1914 state-of-the-art mathematics http://iumj.org/access/