Reaction of large and shallow lakes Peipsi and Võrtsjärv to the changes of nutrient loadingNõges, Tiina; Järvet, Arvo; Kisand, Anu; Laugaste, Reet; Loigu, Enn; Skakalski, Boris; Nõges, PeeterHydrobiologia2007 / p. 253-264 https://link.springer.com/article/10.1007/s10750-007-0603-z