Sebastian Martin Peter Kaufmann Mario Botsch Martin Wicke Markus H. Gross Polyhedral Finite Elements Using Harmonic Basis Functions. 1521-1529 2008 27 Comput. Graph. Forum 5 http://dx.doi.org/10.1111/j.1467-8659.2008.01293.x db/journals/cgf/cgf27.html#MartinKBWG08