@inproceedings{Sliusar:2021CG,
  author = "Sliusar, Vitalii  and  Arbet-Engels, Axel  and  Baack, Dominik  and  Balbo, Matteo  and  Biland, Adrian  and  Bretz, Thomas  and  Buss, Jens  and  Dorner, Daniela  and  Eisenberger, Laura  and  Elsaesser, Dominik  and  Hildebrand, Dorothee  and  Iotov, Roman  and  Kalenski, Adelina  and  Mannheim, Karl  and  Mitchell, Alison  and  Neise, Dominik  and  Noethe, Maximilian  and  Paravac, Aleksander  and  Rhode, Wolfgang  and  Schleicher, Bernd  and  Walter, Roland",
  title = "{Relentless multi-wavelength variability of Markarian 421 and Markarian 501}",
  doi = "10.22323/1.395.0808",
  booktitle = "Proceedings of 37th International Cosmic Ray Conference {\textemdash} PoS(ICRC2021)",
  year = 2021,
  volume = "395",
  pages = "808"
}