Abdurrahman Aktumsek, Gokhan Zengin, Cengiz Sarikurkcu. 2015. “Phenolic Composition of Anchusa undulata L. Subsp. Hybrida (Ten.) Coutinho from Turkey”. Journal of Medicinal Herbs and Ethnomedicine 1 (November):1-3. https://updatepublishing.com/journal/index.php/jmhe/article/view/2864.