The importance of special relativistic effects in modelling ultra-fast outflowsA. Luminari, F. Tombesi, E. Piconcelli, F. Nicastro, K. Fukumura, D. Kazanas, F. Fiore and L. ZappacostaA&A, 633 (2020) A55DOI: https://doi.org/10.1051/0004-6361/201936797
