STEINBERG, Christian, E. W., Thomas MEINELT, Maxim, A. TIMOFEYEV,
Michal BITTNER a Ralph MENZEL. Humic Substances: Part 2: Interactions with Organisms.
Environmental Science and Pollution Research. Springer, roč. 2, č. 15, s. 128-135, 7 s. ISSN 0944-1344. 2008.