1. 1. Anisimov VN. [Experimental research on ageing in Russia]. Experimental Gerontology. 2001; 36(7): 935-45. Russian.
2. 2. Atramentova LA, Utevskaya OM. [Statistical methods in biology]. Gorlovka.: Likhtar; 2008. 248 p. Russian.
3. 3. Babijchuk VG. Аge peculiarities of nitrogen oxide role in adaptation mechanisms of animals to rhythmic cold effects. Report 1. Сontent of final products of no exchange in blood and myocardium of young and aged animals after rhythmic cold effects. Problems of Cryobiology. 2006; 16(4): 377-89.
4. 4. Babijchuk VG, Kozlov OV. [Effect of extreme cooling on indices of vegetative regulation of cardiac rhythm in rats of different age groups]. Problems of Cryobiology. 2008; (3): 374-78.
5. 5. Babijchuk VG. Influence of extreme cryotherapy on the morphofunctional state of the central nervous and cardiovascular systems. Problems of Cryobiology. 2005; 15(3): 458-64.