Broadband X-ray spectra and timing of the accreting millisecond pulsar Swift J1756.9–2508 during its 2018 and 2019 outburstsZ. S. Li, L. Kuiper, M. Falanga, J. Poutanen, S. S. Tsygankov, D. K. Galloway, E. Bozzo, Y. Y. Pan, Y. Huang, S. N. Zhang and S. ZhangA&A, 649 (2021) A76DOI: https://doi.org/10.1051/0004-6361/202140360