1. Hollo, J., Laszlo, E., Szejtli, J., (Budapest) and Lux, J., (Almas Fuzlto), “Significance and Degradation of Starch in the Bayer Process III., The Breakdown of Starch and its Residual Products”, Die Starke, Vol. 2, 1965, pp. 36–40.
2. Breuer, G., “Untersuchugen uber Huminsauren im Bauxit und deren im Bayer-Verfahren entstehende Abbauprodukte (Investigations on humic acids in bauxite and their breakdown products arising in the Bayer Process)”, Thesis, Technische Hochschule, Aechen, 1954.
3. Jakab, T., Dubach, P., Mehta, N.C. and Deuel, H., Z.Pflanzenernahr. Dung. Bodenk., Vol. 97, 1963, p8.
4. Neyroud, J.A. and Schnitzer, M., “The Alkaline Hydrolysis of Humic Substances”, Geoderma, Vol. 13, 1975, pp. 171–188.
5. Schnitzer, M. and Khan, S.T., Humic Substances in the Environment, Marcel Dekker, Inc., New York, 1972, pp. 55–201.