G. BOJDYS, T. GRABOWSKA, A. WÓJCIK, and Z. MEDOŃ, “Study on the relative local temporal changes of the geomagnetic field on the Lublin slope of the East European Craton (the Parczew - Chełm profile)”, geol, vol. 36, no. 2, p. 155, Apr. 2010, doi: 10.7494/geol.2010.36.2.155.