Trendafilova, Antoaneta, Victoria Ivanova, Milka Todorova, Plamena Staleva, and Ina Aneva. “Terpenoids in Four Inula Species from Bulgaria: Scientific Paper”. Journal of the Serbian Chemical Society 86, no. 12 (December 21, 2021): 1229–1240. Accessed March 28, 2024. https://shd-pub.org.rs/index.php/JSCS/article/view/11011.