@Misc{ belfusgug, author = { Bellettini, Giovanni and Fusco, Giorgio and Guglielmi, Nicola }, title = { A concept of solution for forward-backward equations of the form $u_t = \frac{1}{2}(p'(u_x))_x$ and numerical experiments for the singular perturbation $u_t = - \eps^2 u_{xxxx} + \frac{1}{2} (\phi'(u_x))_x$ }, journal = { Discrete Cont. Dyn. Syst. }, year = { 2006 }, volume = { 16 }, number = { 4 }, pages = { 783-842 }, URL = { http://cvgmt.sns.it/paper/1000/ }, note = { cvgmt preprint} }