Super-slowly rotating Ap (ssrAp) stars: Spectroscopic study G. Mathys, D. L. Holdsworth, M. Giarrusso, D. W. Kurtz, G. Catanzaro and F. Leone A&A, 691 (2024) A186 Published online: 13 November 2024 DOI: 10.1051/0004-6361/202451437