TY - JOUR AU - Kružík, Martin TI - Quasiconvexity at the boundary and concentration effects generated by gradients JO - ESAIM: Control, Optimisation and Calculus of Variations PY - 2013 SP - 679 EP - 700 VL - 19 IS - 3 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/cocv/2012028/ DO - 10.1051/cocv/2012028 LA - en ID - COCV_2013__19_3_679_0 ER -