Development of large shallow Lake Peipsi (North-Eastern Europe) over the Holocene based on the stratigraphy of phosphorus fractionsKisand, Anu; Kirsi, Anna-Liisa; Ehapalu, Kristiina; Alliksaar, Tiiu; Heinsalu, Atko; Tõnno, Ilmar; Leeben, Aina; Nõges, PeeterJournal of paleolimnology2017 / p. 43-56 : ill https://doi.org/10.1007/s10933-017-9954-2

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