The physical meaning of scattering matrix singularities in coupled-channel formalisms⋆ - BRAG 2007 Workshop summaryS. Capstick, A. Švarc, L. Tiator, J. Gegelia, M. M. Giannini, E. Santopinto, C. Hanhart, S. Scherer, T. -S. H. Lee, T. Sato and N. SuzukiEur. Phys. J. A, 35 3 (2008) 253-266DOI: https://doi.org/10.1140/epja/i2007-10576-1