@article{Linnik_2018 author = {P.N. Linnik and V. A. Zhezherya and R. P. Linnik}, title = {Iron in Natural Surface Waters of Ukraine: Content, Peculiarities of Migration and Biological Role}, journal = {Hydrobiological Journal}, issn = {0018-8166}, year = {2018}, volume = {54}, number = {5}, pages = {63--80} }