@inproceedings{Anastasopoulos:2022iU,
  author = "Anastasopoulos, Pascal  and  Bianchi, Massimo  and  Consoli, Dario  and  Kiritsis, Elias",
  title = "{Gravi/dark photons in D-brane and holographic models, and the hypercharge portal}",
  doi = "10.22323/1.406.0054",
  booktitle = "Proceedings of Corfu Summer Institute 2021 "School and Workshops on Elementary Particle Physics and Gravity" {\textemdash} PoS(CORFU2021)",
  year = 2022,
  volume = "406",
  pages = "054"
}