PETKOVA, Nadezhda; STEFANOV, Kristian; OGNYANOV, Manol; MIHAYLOVA, Dasha; VASSILEV, Dragomir. PHYTOCHEMICAL STUDY OF COMFREY (SYMPHYLUS OFFICINALE L.) ROOT EXTRACTS. ENVIRONMENT. TECHNOLOGY. RESOURCES. Proceedings of the International Scientific and Practical Conference, Rezekne, Latvia, v. 1, p. 295–299, 2024. DOI: 10.17770/etr2024vol1.7942. Disponível em: https://journals.rta.lv/index.php/ETR/article/view/7942.. Acesso em: 14 apr. 2025.