TY - JOUR AU - S. T. Sadetov TI - On Extensions of Lie Algebras by Means of the Heisenberg Algebra JO - Matematičeskie zametki PY - 2005 SP - 745 EP - 747 VL - 78 IS - 5 PB - mathdoc UR - http://geodesic.mathdoc.fr/item/MZM_2005_78_5_a9/ LA - ru ID - MZM_2005_78_5_a9 ER -