@article{articlea3631c20,
title   = {Forward scattering amplitudes and the thermal operator representation},
author = {Brandt, Fernando Tadeu Caldeira and Das, Ashok and Frenkel, Josif and Perez, Silvana},
year = {2006},
doi = {10.1103/physrevd.74.125005},
journal   = {Physical Review D}
}