@article{10_1007_s10492_011_0002_7,
     author = {Apel, Thomas and Sirch, Dieter},
     title = {$L^2$-error estimates for {Dirichlet} and {Neumann} problems on anisotropic finite element meshes},
     journal = {Applications of Mathematics},
     pages = {177--206},
     publisher = {mathdoc},
     volume = {56},
     number = {2},
     year = {2011},
     doi = {10.1007/s10492-011-0002-7},
     mrnumber = {2810243},
     zbl = {1224.65252},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.1007/s10492-011-0002-7/}
}