1. P. Astone et al., Il Nuovo Cimento, 20C, No. 1, 9 (1997).
2. Yu. G. Sosulin, Theoretical Principles of Radar and Radio Navigation [in Russian], Radio i Svyaz', Moscow (1992).
3. V. I. Tikhonov, Statistical Radio Engineering [in Russian], Radio i Svyaz', Moscow (1982).
4. L. Conti et al., Class. Quantum. Grav., 19, 1919 (2002).
5. P. S. Akimov et al., Signal Observation Theory [in Russian], Radio i Svyaz', Moscow (1984).