Combined recoil and threshold resummation for hard scattering cross   sections
  We discuss the simultaneous resummation of threshold and recoil enhancements to partonic cross sections due to soft radiation. Our method is based on a refactorization of the parton cross section near its partonic threshold. It avoids double counting, conserves the flow of partonic energy, and reproduces either threshold or recoil resummation when the other enhancements are neglected. 
Eric Laenen, George Sterman, Werner Vogelsang