2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/44395We present a short historical and bibliographical review of the lepton mass formula of Yoshio Koide, as well as some speculations on its extensions to quark and neutrino masses, and its possible relations to more recent theoretical developments.10 pages, 1 figureHigh Energy Physics - Phenomenologytext