@article{article43272841,
title   = {Factorization of finite temperature graphs in thermal QED},
author = {Brandt, Fernando Tadeu Caldeira and Das, Ashok and Espinosa, Olivier and Frenkel, Josif and Perez, Silvana},
year = {2006},
doi = {10.1103/physrevd.73.067702},
journal   = {Physical Review D}
}