2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/93175An explicitly covariant formalism for dealing with Bargmann-Wigner fields is developed. An invariance of the Barmann-Wigner norm can be proved in a unified way for both massive and massless fields. It is shown that there exists some freedom in the choice of the form of the Bargmann-Wigner scalar product.revtex, 8 pages, no figuresQuantum Physicstext