AUTHOR=Semenov Vladimir S. , Kubyshkin Igor V. , Tsyganenko Nikolai A. , Erkaev Nikolai V. , Kubyshkina Marina V. , Wang Xiaogang TITLE=Unsteady Dungey cycle from the point of view of Stokes’ theorem JOURNAL=Frontiers in Astronomy and Space Sciences VOLUME=11 YEAR=2024 URL=https://www.frontiersin.org/journals/astronomy-and-space-sciences/articles/10.3389/fspas.2024.1494150 DOI=10.3389/fspas.2024.1494150 ISSN=2296-987X