@Article{angeo-16-804-1998,
AUTHOR = {St\v{r}e\v{s}t\'{\i}k, J.},
TITLE = {Spectrum of geomagnetic activity in the period range 5−60 days: possible lunar influences},
JOURNAL = {Annales Geophysicae},
VOLUME = {16},
YEAR = {1998},
NUMBER = {7},
PAGES = {804--811},
URL = {http://www.ann-geophys.net/16/804/1998/},
DOI = {10.1007/s00585-998-0804-4}
}