@article{Yakupov2002a,
author={Yakupov, V.S. and Yakupov, S.V.},
title={A method for measuring the geomagnetic flux modulus},
journal={Russian Journal of Earth Sciences},
publisher={Geophysical Center of the Russian Academy of Sciences},
year={2002},
pages={243-245},
volume={4},
issue={3},
}