Exact and paraxial Airy propagation of relativistic electron plasma wavepackets Maricarmen A. Winkler, Camilo Vásquez-Wilson and Felipe A. Asenjo Eur. Phys. J. D, 77 6 (2023) 97 Published online: 06 June 2023 DOI: 10.1140/epjd/s10053-023-00679-5