Tucakov, Marko. “Seasonal Changes in the Number of the Grey Heron Ardea Cinerea Occurring on Kolut Fishponds in Northern Serbia”. Ornis Svecica 15, no. 2 (April 1, 2005): 113–118. Accessed November 23, 2024. https://journals.lub.lu.se/os/article/view/22743.