DOLINSKÝ, P., F. VALACH, M. VÁCZYOVÁ, and M. HVOŽDARA. “Geomagnetic Ground Survey in Slovakia for the 2007.5 Epoch”. Contributions to Geophysics and Geodesy, Vol. 39, no. 3, Sept. 2009, pp. 255-72, https://journal.geo.sav.sk/cgg/article/view/21.