@article{CRMATH_2008__346_13-14_735_0,
     author = {Pierre Bousquet and Augusto C. Ponce and Jean Van Schaftingen},
     title = {A case of density in $ {W}^{2,p}(M;N)$},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {735--740},
     publisher = {Elsevier},
     volume = {346},
     number = {13-14},
     year = {2008},
     doi = {10.1016/j.crma.2008.05.006},
     language = {en},
}