An L^{\infty} bound for a time-discrete regularization of a forward-backward parabolic equation Nora Muler Indiana University Mathematics Journal 1996 text pdf 10.1512/iumj.1996.45.1151 10.1512/iumj.1996.45.1151 en Indiana Univ. Math. J. 45 (1996) 683 - 694 state-of-the-art mathematics http://iumj.org/access/