Pauli–Villars regularization elucidated in Bopp–Podolsky’s generalized electrodynamics Chueng-Ryong Ji, Alfredo Takashi Suzuki, Jorge Henrique Sales and Ronaldo Thibes Eur. Phys. J. C, 79 10 (2019) 871 Published online: 23 October 2019 DOI: 10.1140/epjc/s10052-019-7384-1