• A comparison of the palaeolimnology of Peipsi and Võrtsjärv: connected shallow lakes in north-eastern Europe for the twentieth century, especially in relation to eutrophication progression and water-level fluctuationsLeeben, Aina; Freiberg, Rene; Tõnno, Ilmar; Kõiv, Toomas; Alliksaar, Tiiu; Heinsalu, AtkoHydrobiologia2013 / p. 227-240 : ill https://doi.org/10.1007/s10750-012-1209-7 https://www.scopus.com/sourceid/15168 https://www.scopus.com/record/display.uri?eid=2-s2.0-84876664410&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=b&s=DOI%2810.1007%2Fs10750-012-1209-7%29&sessionSearchId=16314ced3f93db00e1cd16f9eeb5fc34 https://jcr.clarivate.com/jcr-jp/journal-profile?journal=HYDROBIOLOGIA&year=2013 https://www.webofscience.com/wos/woscc/full-record/WOS:000318170200019
• Ecosystem changes in large and shallow Võrtsjärv, a lake in Estonia - evidence from sediment pigments and phosphorus fractionsTõnno, Ilmar; Kirsi, Anna-Liisa; Freiberg, Rene; Alliksaar, Tiiu; Lepane, Viia; Kõiv, Toomas; Kisand, Anu; Heinsalu, AtkoBoreal environment research2013 / p. 195-208 : ill https://www.semanticscholar.org/paper/Ecosystem-changes-in-large-and-shallow-V%C3%B5rtsj%C3%A4rv%2C-a-T%C3%B5nno-Kirsi/1b6537bb746d1efabb83b1db1529b453fa231138 https://www.scopus.com/sourceid/23840 https://www.scopus.com/record/display.uri?eid=2-s2.0-84878868017&origin=resultslist&sort=plf-f&src=s&sot=b&sdt=cl&cluster=scoprefnameauid%2C%22Kirsi%2C+A.L.%2356011983700%22%2Ct&s=SRCTITLE%28%22Boreal+Environment+Research%22%29&sessionSearchId=5cfd437765a5c58016f99a0091e81916