Kurazhkovsky, A. Y., N. A. Kurazhkovskaya, and B. I. Klayn. “The Use of Sedimentary Rocks to Determine the Intensity of the Ancient Geomagnetic Field”. Geofizicheskiy Zhurnal, vol. 34, no. 3, June 2012, pp. 116-28, doi:10.24028/gzh.0203-3100.v34i3.2012.116647.