Investigation of abnormal absorption of cosmic-ray hadrons in lead calorimetersA.S. Borisov, V.G. Denisova, V.I. Galkin, Z.M. Guseva, E.A. Kanevskaya, M.G. Kogan, R.A. Mukhamedshin, S.I. Nazarov, V.S. Puchkov and T.Kh. SadykovEPJ Web Conf., 208 (2019) 06001DOI: https://doi.org/10.1051/epjconf/201920806001