European Physical Journal A European Physical Journal A, EDP Sciences, 2020, 56 (5), pp.147. ⟨10.1140/epja/s10050-020-00148-2⟩ Eur.Phys.J.A Eur.Phys.J.A, 2020, 56 (5), pp.147. ⟨10.1140/epja/s10050-020-00148-2⟩ The European Physical Journal A The European Physical Journal A, Springer, 2020, 56 (5), pp.147. ⟨10.1140/epja/s10050-020-00148-2⟩