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Interpolation of non-smooth functions on anisotropic finite element meshes
ESAIM: Mathematical Modelling and Numerical Analysis , Tome 33 (1999) no. 6, pp. 1149-1185.

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Apel, Thomas. Interpolation of non-smooth functions on anisotropic finite element meshes. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 33 (1999) no. 6, pp. 1149-1185. http://geodesic.mathdoc.fr/item/M2AN_1999__33_6_1149_0/

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