@article{DAN_1979_245_1_a11,
     author = {L. V. Ershov and E. I. Zeldich},
     title = {Investigation of the stability of the equilibrium of threedimensional deformable bodies},
     journal = {Doklady Akademii Nauk},
     pages = {47--50},
     publisher = {mathdoc},
     volume = {245},
     number = {1},
     year = {1979},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1979_245_1_a11/}
}