Multi-reference many-body perturbation theory for nuclei - I. Novel PGCM-PT formalismM. Frosini, T. Duguet, J.-P. Ebran and V. SomàEur. Phys. J. A, 58 4 (2022) 62DOI: https://doi.org/10.1140/epja/s10050-022-00692-z