1. J. R. RHODES, A Coal Ash Monitor with Low Dependence on Ash Composition, IAEA, Vienna, 1966.
2. B. DZIUNIKOWSKI, Raport INT 126/I, Kraków, 1978.
3. R. BUREK, A comparative analysis of radiometric ash content determination methods. 4th Conf. on Radioisotope Application and Radiation Processing in Industry, September 19–23, 1988, Abstr. of papers.
4. R. BUREK, Zeszyty Naukowe Politechniki Lubelskiej, Seria B (1981) 5.
5. R. BUREK, M. PALICA, Nukleonika 14 (1969) 1011.