1. J. Maya, M. W. Grossman, R. Lagychenko, and J. F. Waymouth, Science 226, 435 (1984).
2. M. V. Grossman, S. G. Jonnson, and J. Maya, J. of IES, No. 13, 89 (1983).
3. N. R. Batarchukova, Usp. Fiz. Nauk L6, 265 (1956).
4. V. V. Grigor’yants, N. N. Zolin, and M. E. Zhabotinskii, Quantum Frequency Standards (Nauka, Moscow, 1980) [in Russian].
5. N. M. Pomerantsev, V. M. Ryzhkov, and G. V. Skrotskii, Physical Foundations of Quantum Magnetometry (Nauka, Moscow, 1972) [in Russian].