@article {GR2015,
   author = {Gillette, Andrew and Rand, Alexander},
   title = {Interpolation error estimates for harmonic coordinates on polytopes},
   journal = {ESAIM: Mathematical Modelling and Numerical Analysis},
   volume = {50},
   number = {3},
   pages = {651-676},
   url = {http://dx.doi.org/10.1051/m2an/2015096},
   year = {2016},
}