@article{10_21136_AM_2017_0150_17,
     author = {Oswald, Peter},
     title = {Nonconforming {P1} elements on distorted triangulations: {Lower} bounds for the discrete energy norm error},
     journal = {Applications of Mathematics},
     pages = {433--457},
     publisher = {mathdoc},
     volume = {62},
     number = {5},
     year = {2017},
     doi = {10.21136/AM.2017.0150-17},
     mrnumber = {3722898},
     zbl = {06819515},
     language = {en},
     url = {http://geodesic.mathdoc.fr/articles/10.21136/AM.2017.0150-17/}
}