VALACH, Fridrich; VÁCZYOVÁ, Magdaléna; VÝBERČI, Dalibor; KOČI, Eduard. 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. Contributions to Geophysics and Geodesy, [S. l.], v. 54, n. 1, p. 23–48, 2024. DOI: 10.31577/congeo.2024.54.1.2. Disponível em: https://journal.geo.sav.sk/cgg/article/view/497. Acesso em: 16 aug. 2025.