@article{2007long-term,
author={, .. and , .. and Kolstrom, T.. and , .. and , .. and , ..},
title={Long-term solar activity variations as a stimulator of abrupt climate change},
journal={Russian Journal of Earth Sciences},
publisher={Геофизический центр Российской Академии Наук},
year={2007},
pages={1-9},
volume={9},
issue={3},
}