T. van Ritbergen

The next-next-to-leading QCD approximation for non-singlet moments of deep inelastic structure functions

T. V. Ritbergen, J. Vermaseren, S. A. Larin, 1994 .

The 3-loop QCD calculation of the moments of deep inelastic structure functions

J.A.M. Vermaseren, P. Nogueira, T. V. Ritbergen, 1996, hep-ph/9605317.

The 4-loop quark mass anomalous dimension and the invariant quark mass

J.A.M. Vermaseren, T. V. Ritbergen, J. Vermaseren, 1997, hep-ph/9703284.