@article{SM_1989_64_2_a1,
     author = {Yu. V. Billing},
     title = {On a homomorphic image of a special {Lie~algebra}},
     journal = {Sbornik. Mathematics},
     pages = {319--322},
     publisher = {mathdoc},
     volume = {64},
     number = {2},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/SM_1989_64_2_a1/}
}