Searching for temporary gamma-ray dark blazars associated with IceCube neutrinos E. Kun, I. Bartos, J. Becker Tjus, P. L. Biermann, A. Franckowiak, F. Halzen and Gy. Mező A&A, 679 (2023) A46 Published online: 01 November 2023 DOI: 10.1051/0004-6361/202346710