@Article{angeo-29-1341-2011,
AUTHOR = {Du, Z. L.},
TITLE = {The correlation between solar and geomagnetic activity – Part 2: Long-term trends},
JOURNAL = {Annales Geophysicae},
VOLUME = {29},
YEAR = {2011},
NUMBER = {8},
PAGES = {1341--1348},
URL = {https://angeo.copernicus.org/articles/29/1341/2011/},
DOI = {10.5194/angeo-29-1341-2011}
}