Measurement of knees of the spectra of heavy nuclei above 10 PeV with LHAASO Z. Cao, L.L. Ma, S.S. Zhang, C. Wang, L.Q. Yin and B.Y. Bi EPJ Web Conf., 208 (2019) 14002 Published online: 10 May 2019 DOI: 10.1051/epjconf/201920814002