Anthropogenic eutrophication of the Neva estuary and eastern part of the Gulf of FinlandTsvetkova, Ludmila I.; Kopina, G.I.; Ponomareva, V.N.Theses of the reports of the VIII Symposium Concerning the Problems of Waterbodies Water Quality, Tallinn, Oct. 23-25, 19901990 / p. 76-79: ill

Elaboration of ecological regional standards for protection of water-bodiesAlekseev, Mihail; Tsvetkova, Ludmila I.; Neverova, Elena V.Environmental Protection Strategy Standardization and Control of Pollution Load on the Marine Environment : 1st International Conference, 20-24 September 1993, Tallinn, Estonia : abstracts1993 / p. 43

Elaboration of ecological standards for protection of water bodiesTsvetkova, Ludmila I.; Alekseev, Mihail; Neverova, Elena V.Environmental Protection Strategy Standardization and Control of Pollution Load on the Marine Environment : 1st International Conference, 20-24 September 1993, Tallinn, Estonia1994 / p. 157-159

The experience of ecological condition regulation in the Neva Bay and the eastern part of Gulf of Finland by manoeuvring flood defending complex water-gatesUsanov, Boris P.; Tsvetkova, Ludmila I.; Mikhailenko, Rosa R.; Pitulko, Victor M.Environmental Protection Strategy Standardization and Control of Pollution Load on the Marine Environment : 1st International Conference, 20-24 September 1993, Tallinn, Estonia1994 / p. 111-117: ill

The experience of management of ecological condition of the Neva Bay and the eastern part of the Gulf of Finland by manoeuvring flood defending complex water-gatesUsanov, Boris P.; Tsvetkova, Ludmila I.; Michailenko, Rosa R.; Pitulko, Victor M.Environmental Protection Strategy Standardization and Control of Pollution Load on the Marine Environment : 1st International Conference, 20-24 September 1993, Tallinn, Estonia : abstracts1993 / p. 27