1. M. SAKANOUE, Y. MARUO, K. KOMURA, Methods of Low-Level Counting and Spectrometry, IAEA-STI/PUS/592, 1981, p. 105.
2. S. HISAMATSU, M. SAKANOUE, Nucl. Instr. Methods, 226 (1984) 482.
3. K. KOMURA, M. SAKANOUE, M. YAMAMOTO, Health Phys., 46 (1984) 1213.
4. V. E. NOSHKIN, Transuranic: Elements in the Environment, USDOE Technical Information Center, Oak Ridge, Tenn. 1980, p. 578.
5. D. W. EFFORD, G. W. KNOBELOCH, R. E. PERRIN, D. W. BARR, Health Phys., 47 (1984) 786.