Bārdule, Arta, Dagnija Lazdiņa, Kristīne Zadvinska, Lauma Buša, Arturs Vīksna, and Andis Bārdulis. “Carbon and Nitrogen Stabile Isotope Ratio and Heavy Metals in Leccinum Aurantiacum in a Hybrid Aspen Plantation in Agricultural Land Initially Fertilised With Biogas Production Residues, Sewage Sludge, and Wood Ash”. Baltic Forestry 26, no. 1 (March 27, 2020). Accessed May 22, 2024. https://balticforestryojs.lammc.lt/ojs/index.php/BF/article/view/424.