1. V. P. Voitenko, L. G. Barbarik, and Yu. V. Pakin, Ter. Arkh., No. 12, 34 (1974).
2. E. A. Gorbatenkova, O. A. Azizova, E. G. Redchits, et al., Byull. Éksp. Biol. Med., No. 1, 17 (1984).
3. R. V. Petrov, Sov. Med., No. 7, 8 (1978).
4. A. Boyum, Scand. J. Clin. Lab. Invest.,21, 77 (1968).
5. S. Gell and P. J. Gell, J. Exp. Med.,122, 423 (1965).