@article{DAN_1977_235_4_a17,
     author = {B. I. Birger},
     title = {Complex viscosity and {Boussinesq} approximation in the analysis of {Earth} upper mantle convective instability},
     journal = {Doklady Akademii Nauk},
     pages = {794--797},
     publisher = {mathdoc},
     volume = {235},
     number = {4},
     year = {1977},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1977_235_4_a17/}
}