Phenomenology of relativistic reaction amplitudes within the isobar approximationA. Jackura, C. Fernández-Ramírez, V. Mathieu, M. Mikhasenko, J. Nys, A. Pilloni, K. Saldaña, N. Sherrill, A. P. Szczepaniak and Joint Physics Analysis CenterEur. Phys. J. C, 79 1 (2019) 56DOI: https://doi.org/10.1140/epjc/s10052-019-6566-1