@article{CRMATH_2004__338_12_969_0,
     author = {Vitoriano Ruas and Fattehallah Ghadi and Mohamed Wakrim},
     title = {External approximation of $ H^{3}\mathrm{(\Omega )}$ in a bounded domain of $ \mathbb{R}^{3}$ with piecewise cubics of weak {\protect\emph{C}\protect\textsuperscript{2}-class}},
     journal = {Comptes Rendus. Math\'ematique},
     pages = {969--974},
     publisher = {Elsevier},
     volume = {338},
     number = {12},
     year = {2004},
     doi = {10.1016/j.crma.2004.03.038},
     language = {en},
}