The Jost function and Siegert pseudostates from R-matrix calculations at complex wavenumbers P. Vaandrager, J. Dohet-Eraly and J.-M. Sparenberg Eur. Phys. J. A, 60 5 (2024) 99 Published online: 06 May 2024 DOI: 10.1140/epja/s10050-024-01316-4