Gauge and parametrization dependence in higher derivative quantum   gravity
  The structure of counterterms in higher derivative quantum gravity is reexamined. Nontrivial dependence of charges on the gauge and parametrization is established. Explicit calculations of two-loop contributions are carried out with the help of the generalized renormgroup method demonstrating consistency of the results obtained. 
Kirill. A. Kazakov, Petr. I. Pronin