(1)
VALACH, F.; VÁCZYOVÁ, M.; VÝBERČI, D.; KOČI, E. Regular Observations of the Geomagnetic Field at the Ógyalla Observatory (present-Day Hurbanovo) Near the Turn of the 20th Century, Including Magnetic Storms Accompanied by Auroras in March 1894, September 1898, and October 1903. Contrib. Geophys. Geod. 2024, 54 (1), 23-48. https://doi.org/10.31577/congeo.2024.54.1.2.