Results from the paper

  Reconstruction of heavy quark current correlators at O(\alpha_s^3)
  Y. Kiyo, A. Maier, P. Maierhoefer, P. Marquard
  TTP09-17 

(see also: 
http://www-ttp.physik.uni-karlsruhe.de/cgi-bin/webmaster/abs2html?ttp09-17)