2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/54962Lagrangian formulation of free massive fields corresponding to irreducible representations of the Poincare group of arbitrary integer and half-integer spins in three-dimensional space-time is presented. A relationship of the theory under consideration with the self-duality equations in four dimensions is discussed.LaTex, 13 pages, no figures, to be published in Teor. Mat. FisHigh Energy Physics - Theorytext