1. A. P. Veselkin and A. V. Nikitin, At. Energ.,21, No. 3, 184 (1966).
2. V. D. Kizin et al., At. Energ.,44, No. 6, 492 (1978).
3. I. V. Mednis, Reference Tables for Neutron-ActivationAnalysis [in Russian], Zinatne, Riga (1974).
4. Yu. A. Egorov et al., in: Radiation Safety and Shielding of Nuclear Power Stations [in Russian], No. 5, Atomizdat, Moscow (1981), p. 10.