How to
stay out of trouble in RIXS calculations within
equation-of-motion coupled-cluster damped response theory? Safe
hitchhiking in the excitation manifold by means of core-valence
separation
K. Nanda, M. L. Vidal, R. Faber, S. Coriani, and A. I. Krylov Phys. Chem. Chem. Phys.
22, 2629 – 2641
(2020)