SEARCH Articles Figures Tables Brillouin-Wigner coupled cluster single-root multi-reference Brillouin-Wigner coupled cluster theory multi-reference Cluster coupled Excited states multi-reference coupled cluster Multi couplings Multi-reference Brillouin-Wigner coupled cluster single- and Multi-reference Brillouin-Wigner coupled-cluster theory, single-root Multi-reference coupled cluster expansions Multi-reference coupled-cluster linear Multi-reference coupled-cluster method Multi-reference-configuration interaction coupled-clusters Single-root formulation of the multi-reference Brillouin-Wigner coupled-cluster theory Single-root multi-reference Brillouin-Wigner coupled cluster theory Hilbert space approach State-specific multi-reference coupled-cluster