@article{Avsyuk1999the,
author={Avsyuk, Y.N. and Gerasimov, I.A.},
title={The model of free nutation and regularities of latitude variation process},
journal={Russian Journal of Earth Sciences},
publisher={Geophysical Center of the Russian Academy of Sciences},
year={1999},
pages={477-484},
volume={1},
issue={6},
}