VALACH, F.; VÁCZYOVÁ, M.; DOLINSKÝ, P.; VAJKAI, M. Substitution for Lost One-Hour Means of the Geomagnetic Elements for the First Half of the 20-Th Century at the Hurbanovo Geomagnetic Observatory by Means of Neural Networks. Contrib. Geophys. Geod. 2013, 43 (2), 125-140. https://doi.org/10.2478/congeo-2013-0008.