@Article{ DacMarPao12a, author = { Dacorogna, Bernard and Marcellini, Paolo and Paolini, Emanuele }, title = { The degenerate two well problem for piecewise affine maps }, journal = { Nonlinear Differ. Equ. Appl. (NoDEA) }, year = { 2013 }, doi = { 10.1007/s00030-012-0169-y }, volume = { 20 }, number = { 2 }, pages = { 345--359 }, URL = { http://cvgmt.sns.it/paper/1831/ }, note = { cvgmt preprint} }