ALTINTAS, AYHAN, UFUK KOCA, BETUL DEMIRCI, and K. HUSNU CAN BASER. 2010. “Essential Oil Composition of Endemic Centaurea Tchihatcheffii Fisch. and Mey. From Turkey”. Asian Journal of Chemistry 22 (6):4711-16. https://asianpubs.org/index.php/ajchem/article/view/16824.