2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/85969We generalize the Stueckelberg formalism in the (1/2,1/2) representation of the Lorentz Group. Some relations to other modern-physics models are found.21 pages, no figures, presented at the 5th Mexican DGFM School ``The Early Universe and Observational Cosmology." Nov. 25-29, 2002, Playa del Carmen, Mexico and the Jornadas de Investigacion UAZ-2002, Zacatecas, Oct. 8-11, 2002History and Philosophy of PhysicsHigh Energy Physics - PhenomenologyHigh Energy Physics - TheoryGeneral Physicstext