1. G. A. Andreev and A. A. Potapov, “Active orientation systems by geophysical fields,” Zarubezhnaya Radioelektronika, 9, 62–85 (1988).
2. N. N. Beloglazov, G. I. Dzhangava, and G. P. Chigin, Foundations of Navigation by Geophysical Fields [in Russian], Nauka, Moscow (1985).
3. V. I. Berdyshev, “Best trajectory in the navigation problem by a geophysical field,” Zh. Vychisl. Mat. Mat. Fiz., 42, No. 8, 1144–1150 (2002).
4. V. I. Berdyshev, “Navigation by means of the field of altitudes and its fragment,” Proc. Steklov Math. Inst., Suppl. 1, S24–S36 (2003).
5. V. I. Berdyshev, “Informativity of a trajectory in the navigation problem by the height field,” Dokl. Ross. Akad. Nauk (in press).