@Article{ Bra14, author = { Braides, Andrea and Kreutz, Leonard }, title = { Optimal bounds for periodic mixtures of nearest-neighbour ferromagnetic interactions }, journal = { Atti Accad. Naz. Lincei Rend. Lincei Mat. Appl. }, year = { 2017 }, volume = { 28 }, pages = { 103-117 }, URL = { http://cvgmt.sns.it/paper/2461/ }, note = { cvgmt preprint} }