@article{DAN_1975_223_4_a18,
     author = {Zh. S. Erzhanov and A. A. Kalybaev},
     title = {On the direction and rate of secular motion of the {Earth} poles},
     journal = {Doklady Akademii Nauk},
     pages = {841--847},
     publisher = {mathdoc},
     volume = {223},
     number = {4},
     year = {1975},
     language = {ru},
     url = {http://geodesic.mathdoc.fr/item/DAN_1975_223_4_a18/}
}