@article{DAN_1984_277_3_a18,
     author = {S. L. Yunga},
     title = {On the representation of focal mechanisms of earthquakes on a stress sphere},
     journal = {Doklady Akademii Nauk},
     pages = {585--589},
     publisher = {mathdoc},
     volume = {277},
     number = {3},
     year = {1984},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1984_277_3_a18/}
}