@article{COCV_2006__12_1_64_0, author = {Che{\l}mi\'nski, Krzysztof and Ka{\l}amajska, Agnieszka}, title = {New convexity conditions in the calculus of variations and compensated compactness theory}, journal = {ESAIM: Control, Optimisation and Calculus of Variations}, pages = {64--92}, publisher = {EDP-Sciences}, volume = {12}, number = {1}, year = {2006}, doi = {10.1051/cocv:2005034}, zbl = {1114.49019}, language = {en}, url = {http://www.numdam.org/articles/10.1051/cocv:2005034/} }