Unveiling the periodic variability patterns of the X-ray emission from the blazar PG 1553+113T. Aniello, L. A. Antonelli, F. Tombesi, A. Lamastra, R. Middei, M. Perri, F. G. Saturni, A. Stamerra and F. VerrecchiaA&A, 686 (2024) A300DOI: https://doi.org/10.1051/0004-6361/202449515