Mazej, Zdenka, and Matej Germ. “Seasonal Changes in the Contents of Nutrients in Five Macrophyte Species from the Lake Velenjsko Jezero (Slovenia)”. Acta Biologica Slovenica, vol. 51, no. 1, July 2008, pp. 3-11, https://doi.org/10.14720/abs.51.1.15221.