@article{article27f59d42,
title   = {Retarded thermal Green's functions and forward scattering amplitudes at two loops},
author = {Brandt, Fernando Tadeu Caldeira and Das, A. and Frenkel, Josif},
year = {1999},
doi = {10.1103/physrevd.60.105008},
journal   = {Physical Review D}
}