@misc{dubovsky2003narrowing,
  title={Narrowing the window for millicharged particles by CMB anisotropy},
  author={S. L. Dubovsky and D. S. Gorbunov and G. I. Rubtsov},
  year={2003},
  eprint={hep-ph/0311189},
  archivePrefix={arXiv},
  primaryClass={hep-ph},
  doi={10.1134/1.1675909},
  url={https://arxiv.org/abs/hep-ph/0311189}
}