Investigating dark energy by electromagnetic frequency shifts II: the Pantheon+ sample Giuseppe Sarracino, Alessandro D. A. M. Spallicci and Salvatore Capozziello Eur. Phys. J. Plus, 137 12 (2022) 1386 Published online: 29 December 2022 DOI: 10.1140/epjp/s13360-022-03595-6