@article{Piotrowski:2021Lv,
  author = "Piotrowski, Lech Wiktor  and  Małek, Katarzyna  and  Mankiewicz, Lech  and  Sokołowski, Marcin  and  Wrochna, Grzegorz  and  Zadrożny, Adam  and  Zarnecki, Aleksander Filip",
  title = "{Limits on the flux of heavy compact objects from the the "Pi of the Sky" project}",
  doi = "10.22323/1.395.0536",
  journal = "PoS",
  year = 2021,
  volume = "ICRC2021",
  pages = "536"
}