2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/185516The construction of lagrangians describing the various representations of the Poincare group is given in terms of the BRST approach.8 pages, Latex, style file espcrc2.sty. Talk given at the D.V. Volkov Memorial Conference ``Supersymmetry and Quantum Field Theory'', July 25-30, 2000, Kharkov, to be published in the Nuclear Physics B Conference SupplementsHigh Energy Physics - Theorytext