@article{MM2_1983__44_154959,
     author = {Michael Meier},
     title = {Counter-Examples to {Boundary} {Estimates} for {Two-Dimensional} {Elliptic} {Systems.}},
     journal = {Manuscripta mathematica},
     pages = {59--70},
     publisher = {mathdoc},
     volume = {44},
     year = {1983},
     zbl = {0522.35038},
     url = {http://geodesic.mathdoc.fr/item/MM2_1983__44_154959/}
}