A. Wojas and T. Grabowska, “Relative secular variations of the Earth’s magnetic field in the years 1966–2016 along the profile across the main tectonic units of Poland (Zgorzelec-Wiżajny profile)”, geol, vol. 45, no. 3, p. 183, Nov. 2019, doi: 10.7494/geol.2019.45.3.183.