1. 1) Huttunen K, Keränen H, Väyrynen E, et al.: Effect of cognitive load on speech prosody in aviation: evidence from military simulator flights. Appl Ergon, 2011, 42: 348–357.
2. 2) Balldin UI: Acceleration effects on fighter pilots. In: Pandolf KB, Burr RE (eds.), Medical aspects of harsh environments. Vol. 2. Department of the Army, Office of the Surgeon General, Borden Institute, 2002, pp 1025–1038.
3. 3) Eiken O, Kölegärd R, Bergsten E, et al.: G protection: interaction of straining maneuvers and positive pressure breathing. Aviat Space Environ Med, 2007, 78: 392–398.
4. 4) Otsuki T, Maeda S, Iemitsu M, et al.: Relationship between arterial stiffness and athletic training programs in young adult men. Am J Hypertens, 2007, 20: 967–973.
5. 5) Ebert TJ, Barney JA: Physical fitness and orthostatic tolerance. In: Smith JJ (ed.), Circulatory response to the upright posture. Boca Raton: CRC Press, 1990, pp 47–63.