PKS 1424−418: A persistent candidate source of the mm–γ-ray connection? Dae-Won Kim, Eduardo Ros, Matthias Kadler, Thomas P. Krichbaum, Guang-Yao Zhao, Florian Rösch, Andrei P. Lobanov and J. Anton Zensus A&A, 692 (2024) A203 Published online: 13 December 2024 DOI: 10.1051/0004-6361/202451773