Medium-induced radiative energy loss; equivalence between the BDMPS and   Zakharov formalisms
  We extend the BDMPS formalism for calculating radiative energy loss to the case when the radiated gluon carries a finite fraction of the quark momentum. Some virtual terms, previously overlooked, are now included. The equivalence between the formalism of BDMPS and that of B.Zakharov is explicitly demonstrated. 
R. Baier, Yu.L. Dokshitzer, A.H. Mueller and D. Schiff