Loop integration results using numerical extrapolation for a non-scalar   integral
  Loop integration results have been obtained using numerical integration and extrapolation. An extrapolation to the limit is performed with respect to a parameter in the integrand which tends to zero. Results are given for a non-scalar four-point diagram. Extensions to accommodate loop integration by existing integration packages are also discussed. These include: using previously generated partitions of the domain and roundoff error guards. 
E.de Doncker, Y.Shimizu, J.Fujimoto, F.Yuasa, K.Kaugars, L. Cucos, J.   Van Voorst