Vassilev, Kiril, Nikolay Velev, and Momchil Nazarov. “Contribution to the Knowledge of Crataego-Prunetea Tüxen 1962 Class in Bulgaria”. Hacquetia 19, no. 1 (January 28, 2020): 81–97. Accessed April 24, 2024. https://ojs.zrc-sazu.si/hacquetia/article/view/7267.