TY - JOUR AU - A. A. Zaitsev TI - Positive polarizations and Abelian ideals in Lie algebras JO - Sbornik. Mathematics PY - 1981 SP - 227 EP - 240 VL - 40 IS - 2 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/SM_1981_40_2_a7/ LA - en ID - SM_1981_40_2_a7 ER -