1. J. Hardin and J. Patterson, Acta Astronaut. 6, 1137 (1979).
2. D. E. Olson, D. Hartig, A. Taleb, and J. R. Hammersley, in ILSA Proceedings (Winnipeg, 1989), http://www.ilsa.cc .
3. I. V. Vovk, K. É. Zalutskii, and L. G. Krasnyi, Akust. Zh. 40, 762 (1994) [Acoust. Phys. 40, 676 (1994)].
4. G. Charbonneau, M. Sudraud, and G. Soufflet, Bull. Eur. Physiopathol. Respir. 23(3), 265 (1987).
5. G. Soufflet, G. Charbonneau, M. Polit, et al., IEEE Trans. Biomed. Eng. 37(4), 384 (1990).