A paper by Barton (ibid., vol.20, p.879, 1987) comments on some of Ford et al.'s recent work in this general area and takes issue with some of their conclusions. Ford et al. point out that Barton's reinterpretation of his own previous work actually serves to support their conclusions. In particular, he is making extensive use of thermodynamic concepts (free energy, thermodynamic perturbation theory, . . .) which were introduced for the first time into this area in the papers by Ford et al.
Publication Source (Journal or Book title)
Journal of Physics B: Atomic and Molecular Physics
Ford, G., Lewis, J., & O'Connell, R. (1987). On the thermodynamics of quantum-electrodynamic frequency shifts. Journal of Physics B: Atomic and Molecular Physics, 20 (5), 899-906. https://doi.org/10.1088/0022-3700/20/5/010