2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/56385A short rewiev of covariant quantization methods based on BRST-antiBRST symmetry is given. In particular problems of correct definition of Sp(2) symmetric quantization scheme known as triplectic quantization are considered.(LaTex) 10 pages, Talk given by P.M.L. at the International workshop "Physical Variables in Gauge Theories", Dubna (Russia), 21-25 September 1999 (to appear in the proceedings)High Energy Physics - Theorytext