2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/40574This contribution describes precision width measurements that could be done at a muon collider for very narrow resonances as the Higgs or a possible pseudogoldstone boson, or for almost degenerate resonances as the A0 and H0 in the MSSM for large values of tanβ.LaTex file, 5 pages. Contribution to the Leptre meeting, Rome April 18-20/2001High Energy Physics - Phenomenologytext