Bloch-Nordsieck Approximation in Linearized Quantum Gravity
  The aim of this article is to review Fradkin's contribution in the realm of eikonal physics. In particular, the so-called Fradkin representation is employed to investigate a certain subclass of Feynman diagrams resulting in an expression for the scattering amplitude at Planckian energies. The 't Hooft poles are reproduced. 
Walter Dittrich (Tubingen U.)