====== TTP07-01 Four-Loop Tadpoles and Precision Calculations in Perturbative QCD ======
 
 
<hidden TTP07-01  Four-Loop Tadpoles and Precision Calculations in Perturbative QCD > Recent results on four-loop tadpoles
 amplitudes and their implications for precision calculations are
 presented.
 </hidden>
|**Johann H. K&uuml;hn**  | 
|**      Contibution to the International Conference on High Energy Physics, Moscow, July 2006, to be published in the proceedings **  |
| {{preprints:2007:ttp07-01.pdf|PDF}} {{preprints:2007:ttp07-01.ps|PostScript}}   |
| |