1. B. A. Andreev and I. G. Klushin, Geological Interpretation of Gravitational Anomalies (Gostoptekhizdat, Leningrad, 1962) [in Russian].
2. G. A. Baker, Jr. and P. R. Graves-Morris, Padé Approximants (Cambridge Univ. Press, Cambridge, 1996).
3. I. N. Bekman, Radiochemistry 41 (2), 141–148 (1999).
4. K. M. Ermokhin, Geoinformatika, No. 2, 51–60 (2010).
5. V. N. Strakhov, Extended Abstract of Candidate’s Dissertation in Engineering (Inst. Physics Earth USSR Acad. Sci., Moscow, 1962).