Geodesic
Boundary Regularity for Elliptic Problems with Continuous Coefficients
Journal of convex analysis, Tome 16 (2009) no. 1, pp. 287-32.

Voir la notice de l'article provenant de la source Heldermann Verlag

We consider weak solutions of second order nonlinear elliptic systems in divergence form or of quasi-convex variational integrals with continuous coefficients under superquadratic growth conditions. Via the method of A-harmonic approximation we give a characterization of regular boundary points using and extending some new techniques recently developed by M. Foss and G. Mingione [Ann. Inst. Henri Poincaré Anal. Non Linéaire 25 (2008) 471--503]. 
@article{JCA_2009_16_1_JCA_2009_16_1_a15,
     author = {L. Beck},
     title = {Boundary {Regularity} for {Elliptic} {Problems} with {Continuous} {Coefficients}},
     journal = {Journal of convex analysis},
     pages = {287--32},
     publisher = {mathdoc},
     volume = {16},
     number = {1},
     year = {2009},
     url = {http://geodesic.mathdoc.fr/item/JCA_2009_16_1_JCA_2009_16_1_a15/}
}
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L. Beck. Boundary Regularity for Elliptic Problems with Continuous Coefficients. Journal of convex analysis, Tome 16 (2009) no. 1, pp. 287-32. http://geodesic.mathdoc.fr/item/JCA_2009_16_1_JCA_2009_16_1_a15/