@article{JEMS_2007_9_2_a1,
     author = {Giovanni Leoni and Massimiliano Morini},
     title = {Necessary and sufficient conditions for the chain rule in $W_{\mathrm{loc}}^{1,1}(\mathbb{R}^N; \mathbb{R})$ and $BV_{\mathrm{loc}}(\mathbb{R}^N; \mathbb{R}^d)$},
     journal = {Journal of the European Mathematical Society},
     pages = {219--252},
     publisher = {mathdoc},
     volume = {9},
     number = {2},
     year = {2007},
     doi = {10.4171/jems/78},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/78/}
}