Neutrino masses and Hubble tension via a Majoron in MFVFernando Arias-Aragón, Enrique Fernández-Martínez, Manuel González-López and Luca MerloEur. Phys. J. C, 81 1 (2021) 28DOI: https://doi.org/10.1140/epjc/s10052-020-08825-8