Askin, Hakan, Bilal Yilmaz, Seyma Bakirci, and Arif Ayar. 2018. “Simultaneous Determination of α-Amyrin and β-Sitosterol in Centranthus Longiflorus Stev. Subsp. Longiflorus Stev and Iris Taochia Woronow Ex Grossh by GC-MS Method”. Progress in Nutrition 20 (1-S): 209-17. https://doi.org/10.23751/pn.v20i1-S.6744.