A closed analytical formula for two-loop massive tadpoles with arbitrary   tensor numerators
  Using the integration by parts method we derive a closed analytical expression for the result of the integration of an arbitrary dimensionally regulated tadpole diagram composed of a massless propagator and two massive ones, each raised into an arbitrary power, and including an arbitrary tensor numerator. We also briefly discuss the implementation of the formula in the algebraic manipulation language of FORM. 
K.G. Chetyrkin (Institute for Nuclear Research of the Academy of   Sciences of Russian Federation)