Numerical evaluation of the general massive 2-loop self-mass master   integrals from differential equations
  The system of 4 differential equations in the external invariant satisfied by the 4 master integrals of the general massive 2-loop sunrise self-mass diagram is solved by the Runge-Kutta method in the complex plane. The method offers a reliable and robust approach to the direct and precise numerical evaluation of Feynman graph integrals. 
M. Caffo (1 and 2), H. Czyz (3) and E. Remiddi (2 and 1) ((1)   INFN-Bologna, (2) Univ. of Bologna, (3) Univ. of Silesia)