@article{Grigoryev2020asymmetry,
author={Grigoryev, V.M. and Ermakova, L.V. and Khlystova, A.I.},
title={Asymmetry in occurrence of the leading and following polarities in the photospheric magnetic field at the early stage of active region formation},
journal={Solar-Terrestrial Physics},
publisher={Institute of Solar-Terrestrial Physics SB RAS},
year={2020},
pages={3-9},
volume={6},
issue={4},
}