VANĚK, A., GRYGAR, T., CHRASTNÝ, V., TEJNECKÝ, V., DRAHOTA, P., KOMÁREK, M. Assessment of the BCR sequential extraction procedure for thallium fractionation using synthetic mineral mixtures. Journal of Hazardous Materials. 2010, 176(1-3), 913-918. ISSN 0304-3894. E-ISSN 1873-3336. Available: https://doi.org/10.1016/j.jhazmat.2009.11.123