1. Gorsuch, T.T.: The Destruction of Organic Matter. Pergamon, Oxford (1970)
2. Sansoni, B., Panday, V.K.: Ashing in trace element analysis of biological material. In: Fachetti, S. (ed.) Analytical Techniques for Heavy Metals in Biological Fluids, pp. 91–131. Elsevier, Amsterdam (1983)
3. Subramanian, K.S.: Determination of metals in biofluids and tissue: sample preparation methods for atomic spectroscopic technique. Spectrochim. Acta Part B 51, 291–319 (1996)
4. Iyengar, G.V., Subramanian, K.S., Woittiez, J.R.W.: Sample decomposition. In: Iyengar, G.V., Subramanian, K.S., Woittiez, J.R.W. (eds.) Element Analysis of Biological Samples. Principles and Practice, pp. 103–134. CRC, Boca Raton (1998)
5. Matusiewicz, H.: Review of sample preparation methodology for elemental analysis of cellulose type materials. ICP Inf. Newsl. 25, 510–514 (1999)