@article{RM_1989_44_1_a10,
     author = {O. D. Avraamova},
     title = {On the density theorem},
     journal = {Trudy Matematicheskogo Instituta imeni V.A. Steklova},
     pages = {229--230},
     publisher = {mathdoc},
     volume = {44},
     number = {1},
     year = {1989},
     language = {en},
     url = {http://geodesic.mathdoc.fr/item/RM_1989_44_1_a10/}
}