%0 Journal Article
%A Hiptmair, Ralf
%A Moiola, Andrea
%A Perugia, Ilaria
%A Schwab, Christoph
%T Approximation by harmonic polynomials in star-shaped domains and exponential convergence of Trefftz $hp$-dGFEM
%J ESAIM: Mathematical Modelling and Numerical Analysis 
%D 2014
%P 727-752
%V 48
%N 3
%I EDP-Sciences
%U http://www.numdam.org/articles/10.1051/m2an/2013137/
%R 10.1051/m2an/2013137
%G en
%F M2AN_2014__48_3_727_0