The author of these publications discovered new harmful
effects of chemical pollutants on organisms and formulated an ecologycal theory of polyfunctional (multifunctional) role of biota (sum of organisms) in maintaining and improving water quality:
https://5bio5.blogspot.com/2017/08/author.html
Water quality. Publications of Sergei Ostroumov on water quality, and some articles that cited S. Ostroumov (selected examples). 14 p. https://www.researchgate.net/publication/312531116;
Is it possible to say that the general trend about water.... Available from: https://www.researchgate.net/post/Is_it_possible_to_say_that_the_general_trend_about_water_quality_is_the_global_decrease_in_water_quality?5986afc1dc332dd5883753f3#5986b35eeeae390e7f7391f8 [accessed Aug 6, 2017].
