@article{Gachechiladze_1968,
title={The divergence in the callen and welton formula},
volume={11},
ISSN={0038-5697},
url={http://dx.doi.org/10.1007/bf00820483},
DOI={10.1007/bf00820483},
number={1},
journal={Soviet Physics Journal},
publisher={Springer Science and Business Media LLC},
author={Gachechiladze,
T. G.},
year={1968},
month=jan,
pages={76–78} }