@Article{gi-9-105-2020,
AUTHOR = {Regi, M. and Bagiacchi, P. and Di Mauro, D. and Lepidi, S. and Cafarella, L.},
TITLE = {On the validation of K-index values at Italian geomagnetic observatories},
JOURNAL = {Geoscientific Instrumentation, Methods and Data Systems},
VOLUME = {9},
YEAR = {2020},
NUMBER = {1},
PAGES = {105--115},
URL = {https://gi.copernicus.org/articles/9/105/2020/},
DOI = {10.5194/gi-9-105-2020}
}