Abdurrahman Aktumsek, G. Z. C. S. “Phenolic Composition of Anchusa undulata L. Subsp. Hybrida (Ten.) Coutinho from Turkey”. Journal of Medicinal Herbs and Ethnomedicine, vol. 1, Nov. 2015, pp. 1-3, https://updatepublishing.com/journal/index.php/jmhe/article/view/2864.