- Lebedev S. V. i dr. Korreljacionnyj analiz sily tjazhesti (Otchet NIR MIIGAiK. Reg. № 75 038 768). - MIIGAiK. 1975.
- Kaula W. Statitical and harmonic analysis of gravity. - J. Geophys. Res., 1959, v. 64, № 12.
- Ferrari A. Lunar gravity: a harmonic analysis. - J. Geophys. Res., 1977, v. 82 № 20.