@article{2001spectral,
author={, .. and , .. and , ..},
title={Spectral characteristics of foreshocks preceding major earthquakes of the Kurile-Kamchatka Arc and their application to the prediction of the main shock time},
journal={Russian Journal of Earth Sciences},
publisher={Геофизический центр Российской Академии Наук},
year={2001},
pages={235-245},
volume={3},
issue={3},
}