@Article{hess-11-1747-2007, AUTHOR = {Olli, G.}, TITLE = {Determination of the historical variation of the trophic state in lakes using sediment stratigraphies}, JOURNAL = {Hydrology and Earth System Sciences}, VOLUME = {11}, YEAR = {2007}, NUMBER = {6}, PAGES = {1747--1756}, URL = {http://www.hydrol-earth-syst-sci.net/11/1747/2007/}, ISSN = {1027-5606} }