Danova, T. E., and B. V. Perelygin. “Spectral-Temporal Analysis of Long-Period Climatic Series, the Core of the Greenland Borehole As an Example”. Geofizicheskiy Zhurnal, vol. 38, no. 3, July 2016, pp. 117-2, doi:10.24028/gzh.0203-3100.v38i3.2016.107783.