Experimental studies on formation of water quality and eutrofication of lake ecosystems with enclosuresPogozhev, P.I.; Gerasimova, T.N.; Vavilin, V.A.Theses of the reports of the VIII Symposium Concerning the Problems of Waterbodies Water Quality, Tallinn, Oct. 23-25, 19901990 / p. 55-58: ill https://www.ester.ee/record=b1209554*est