@misc{subramanian2015origin,
  title={The origin, evolution and signatures of primordial magnetic fields},
  author={Kandaswamy Subramanian},
  year={2015},
  eprint={1504.02311},
  archivePrefix={arXiv},
  primaryClass={astro-ph.CO},
  url={https://arxiv.org/abs/1504.02311}
}