Yudov M. V., Zhilin D. M., Pankova A. P., Rusanov A. G., Perminova I. V., Matorin D. N.Synthesis, metal-binding properties and detoxifying ability of sulphonated humic acids. Chapter 24 Use of Humic Substances to Remediate Polluted Environments: From Theory to Practice, Springer, Netherlands, 2005 pp. Eds: I.V. Perminova et al. 485-498