Effects of 2p-2h configurations on low-energy dipole states in neutron-rich N=80, 82 and 84 isotonesN. N. Arsenyev, A. P. Severyukhin, V. V. Voronov and Nguyen Van GiaiEPJ Web of Conferences, 107 (2016) 05006DOI: https://doi.org/10.1051/epjconf/201610705006