Krenz, Kristina, Matthias Henning, and Ellen Kausch. “The Influence of Burning and Mulching on Sand Heath Birds in SPA Colbitz-Letzlinger Heide”. Ecological Questions 21 (July 14, 2015): 75–78. Accessed April 27, 2024. https://apcz.umk.pl/EQ/article/view/EQ.2015.013.