@article{SM_1981_40_2_a7,
     author = {A. A. Zaitsev},
     title = {Positive polarizations and {Abelian} ideals in {Lie} algebras},
     journal = {Sbornik. Mathematics},
     pages = {227--240},
     publisher = {mathdoc},
     volume = {40},
     number = {2},
     year = {1981},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1981_40_2_a7/}
}