What is the right formalism to search for resonances? II. The pentaquark chain - Joint Physics Analysis CenterA. Pilloni, J. Nys, M. Mikhasenko, M. Albaladejo, C. Fernández-Ramírez, A. Jackura, V. Mathieu, N. Sherrill, T. Skwarnicki and A. P. SzczepaniakEur. Phys. J. C, 78 9 (2018) 727DOI: https://doi.org/10.1140/epjc/s10052-018-6177-2