[1] M. Van Camp, T. Camelbeeck, and P. Richard, Physical Magazine, Journal of the Belgian Society 25, 161 (2003).

[2] W. E. Carter, G. Peter, G. S. Sasagawa, F. J. Klopping, K. A. Berstis, R. L. Hilt, P. Nelson, G. L. Christy, T. M. Niebauer, W. Hollander, H. Seeger, B. Richter, H. Wilmes, and A. Lothammer, EOS Trans. Am. Geophys. Union 75, 90 (1994).

[3] J. M. Brown, T. M. Niebauer, B. Richter, F. J. Klopping, J. G. Valentine, and W. K. Buxton, "Miniaturized gravimeter may greatly improve measurements" EOS Online Supplement, http://www.agu.org/eos_elec/99144e.html.

[4] E. R. Pujol, Fisica de la Tierra. 17, 147 (2005).

[5] G. D'Agostino, S. Desogus, A. Germak, C. Origlia, and G. Barbato, Journees Luxembourgeoises de Geodynamique, Nov. 8 (2004).

[6] A. L. Vitouchkine and J. E. Faller, Metrologia 41, L19 (2004).

[7] P. Baldi, E. G. Campari, G. Casula, S. Focardi, G. Levi, and F. Palmonari, Phys. Rev. D 71, 022002 (2005).

[8] G. P. Arnautov, L. D. Gik, E. N. Kalish, V. P. Koronkevitch, I. S. Malyshev, Yu. E. Nesterikhin, Yu. F. Stus, and G. G. Tarasov, Appl. Opt. 13, 310 (1974).

[9] Y. Zhang and P. Huang, Progress in Astronomy (in Chinese) 24, 1 (2006).

[10] H. Gao, Z. Cheng, Z. Ning, P. Cui, and H. Huang, Chin. Opt. Lett. 3, 513 (2005).

[11] F. C. Demarest, Meas. Sci. Technol. 9, 1024 (1998).

[12] Z. Cheng, H. Gao, Z. Zhang, H. Huang, and J. Zhu, Appl. Opt. 45, 2246 (2006).

[13] W. Chen, "Least Uncertainty Estimation Theory and Its Applications" (in Chinese) Master Thesis (Wuhan University, 2005) pp.9-10.