@article{DAN_1972_202_1_a18,
     author = {A. M. Fridman and I. G. Shuhman},
     title = {Collective oscillations of a spherically symmetric system of rotating masses},
     journal = {Doklady Akademii Nauk},
     pages = {67--70},
     publisher = {mathdoc},
     volume = {202},
     number = {1},
     year = {1972},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1972_202_1_a18/}
}