Neutrino portals to dark matterM. Blennow, E. Fernandez-Martinez, A. Olivares-Del Campo, S. Pascoli, S. Rosauro-Alcaraz and A. V. TitovEur. Phys. J. C, 79 7 (2019) 555DOI: https://doi.org/10.1140/epjc/s10052-019-7060-5