@Misc{ LavSan17, author = { Lavenant, Hugo and Santambrogio, Filippo }, title = { Optimal density evolution with congestion: $L^\infty$ bounds via flow interchange techniques and applications to variational Mean Field Games }, journal = { Communications in Partial Differential Equations }, year = { 2017 }, pages = { }, URL = { http://cvgmt.sns.it/paper/3385/ }, note = { cvgmt preprint} }