2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/226996We use Reidemeister torsion to study a twisted Alexander polynomial, as defined by Turaev, for links in the projective space. Using sign-refined torsion we derive a skein relation for a normalized form of this polynomial.To appear on Journal of Knot Theory and Its RamificationsGeometric Topology57M25; 57M05text