@inproceedings{Maio:2020/2,
  author = "Maio, Umberto",
  title = "{Early black-hole seeds in the first billion years}",
  doi = "10.22323/1.362.0014",
  booktitle = "Proceedings of Multifrequency Behaviour of High Energy Cosmic Sources - XIII {\textemdash} PoS(MULTIF2019)",
  year = 2020,
  volume = "362",
  pages = "014"
}