@article {RGB2011a,
   author = {Rand, Alexander and Gillette, Andrew and Bajaj, Chandrajit},
   title = {Quadratic Serendipity Finite Elements on Polygons Using Generalized Barycentric Coordinates},
   journal = {Mathematics of Computation},
   number = {in press},
   url = {http://arxiv.org/abs/1109.3259},
   year = {2011},
}