1. Albanese, S., Sadeghi, M., Lima, A., Cicchella, D., Dinelli, E., Valera, P., Falconi, M., Demetriades, A., & Vivo, B. (2015). GEMAS: cobalt, Cr, Cu and Ni distribution in agricultural and grazing land soil of Europe. Journal of Geochemical Exploration, 154, 81–93.
2. Alef, K., Nannipieri, P. (1998) Methods in applied soil microbiology and biochemistry. Eds., London, Academic Press Harcourt Brace & Company p. 576.
3. Behbahaninia, A., Mirbagheri, S. A., Khorasani, N., Nouri, J., & Javid, A. H. (2009). Heavy metal contamination of municipal effluent in soil and plants. Journal of Food, Agriculture and Environment, 7(3 - 4), 851–856.
4. Borowik, A., Wyszkowska, J., Kucharski, J., Baćmaga, M., & Tomkiel, M. (2014). Pressure exerted by zinc on the nitrification process. Journal of Elementology, 19(2), 327–338.
5. Buekers, J., Mertens, J., & Smolders, E. (2010). Toxicity of the molybdate anion in soil is partially explained by the effects of the accompanying cation or by soil pH. Environmental Toxicology and Chemistry, 29, 1274–1278.