Biermann, P.L. Max Planck Institute for Radio Astronomy, Max Planck Society;
Abreu, P., Aglietta, M., Allekotte, I., and 365 more, i., & Biermann, P. (2023). Search for photons above 10^19 eV with the surface detector of the Pierre Auger Observatory. \jcap, 2023(5): 021, pp. 021. doi:10.1088/1475-7516/2023/05/021.