@article{MZM_2005_78_5_a9,
     author = {S. T. Sadetov},
     title = {On {Extensions} of {Lie} {Algebras} by {Means} of the {Heisenberg} {Algebra}},
     journal = {Matemati\v{c}eskie zametki},
     pages = {745--747},
     publisher = {mathdoc},
     volume = {78},
     number = {5},
     year = {2005},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/MZM_2005_78_5_a9/}
}