@article{JEMS_2004_6_1_a2,
     author = {Mariano Giaquinta and Domenico Mucci},
     title = {Weak and strong density results for the {Dirichlet} energy},
     journal = {Journal of the European Mathematical Society},
     pages = {95--117},
     publisher = {mathdoc},
     volume = {6},
     number = {1},
     year = {2004},
     doi = {10.4171/jems/3},
     url = {http://geodesic.mathdoc.fr/articles/10.4171/jems/3/}
}