@article{Aguilar:2021OO,
  author = "Aguilar, Edilberto  and  Fraija, Nissim",
  title = "{Two-zone model as origin of hard gamma-rays spectrum in extreme BL Lacs}",
  doi = "10.22323/1.395.1007",
  journal = "PoS",
  year = 2021,
  volume = "ICRC2021",
  pages = "1007"
}