2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/46147Talk presented by S.M. Bilenky at the Adriatico Research Conference on "Trends in Collider Spin Physics", ICTP, Trieste, December 1995.LaTeX2e file, 4 pages, no figuresHigh Energy Physics - PhenomenologyThe problem of the spin of the proton and elastic neutrino-proton scatteringtext