Charged-Lepton-Flavour Violation in the light of the Super-Kamiokande data J. Ellis, M.E. Gómez, G.K. Leontaris, S. Lola and D.V. NanopoulosEur. Phys. J. C, 14 2 (2000) 319-334DOI: https://doi.org/epjc/v14/p319(epjc0357)