Evidence of critical dynamics in various electromagnetic precursorsS.M. Potirakis, Y. Contoyiannis, A. Schekotov, K. Eftaxias and M. HayakawaEur. Phys. J. Special Topics, 230 1 (2021) 151-177DOI: https://doi.org/10.1140/epjst/e2020-000249-x