@article{UZERU_2000_2_a6,
     author = {M. G. Abrahamian and S. V. Arutyunyan},
     title = {About the marginal in stability of selfgravitating ring},
     journal = {Proceedings of the Yerevan State University. Physical and mathematical sciences},
     pages = {47--51},
     publisher = {mathdoc},
     number = {2},
     year = {2000},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/UZERU_2000_2_a6/}
}