Vassilev, K. V., M. Nazarov, C. Mardari, B. Grigorov, S. Georgiev, B. Genova, and N. Velev. “Syntaxonomical and Ecological Diversity of the Class Polygono-Poetea Annuae in Bulgaria”. Acta Botanica Croatica, vol. 81, no. 1, Mar. 2022, pp. 32-41, doi:10.37427/botcro-2021-029.