Three-Loop Contributions to the Gluonic Massive Operator Matrix Elements   at General Values of N
  Recent results on the calculation of 3-loop massive operator matrix elements in case of one and two heavy quark masses are reported. They concern the $O(n_f T_F^2 C_{F,A})$ and $O(T_F^2 C_{F,A})$ gluonic corrections, two-mass quarkonic moments, and ladder- and Benz-topologies. We also discuss technical aspects of the calculations. 
J. Ablinger, J. Bl\"umlein, A. De Freitas, A. Hasselhuhn, S. Klein, C.   Raab, M. Round, C.Schneider, F. Wi{\ss}brock
hep-ph hep-th math-ph math.MP