KOČI, Eduard, and Fridrich VALACH. “A Sign of the Dayside Current Wedge in Geomagnetic Observations at Stará Ďala (present-Day Hurbanovo) on 16 April 1938”. Contributions to Geophysics and Geodesy, vol. 55, no. 3, Sept. 2025, pp. 297–311, https://doi.org/10.31577/congeo.2025.55.3.2.