@article{VMUMM_1987_2_a7,
     author = {V. K. Akhmetov and V. Ya. Shkadov},
     title = {Stability of a free vortex},
     journal = {Vestnik Moskovskogo universiteta. Matematika, mehanika},
     pages = {35--40},
     publisher = {mathdoc},
     number = {2},
     year = {1987},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/VMUMM_1987_2_a7/}
}