@article{Nazarova2004large,
author={Nazarova, K.A. and Tsvetkov, Y.. and Heirtzler, J.. and Sabaka, T..},
title={Large magnetic anomalies over Russia revealed by balloon data},
journal={Russian Journal of Earth Sciences},
publisher={Geophysical Center of the Russian Academy of Sciences},
year={2004},
pages={457-460},
volume={6},
issue={6},
}