Kasenov, R., Demets, O., Kartbayeva, G., Zhumadilov, S., Alieva, M., Zhumabekova, A., … Bakibayev, A. (2019). Extraction of betulin — natural triterpenoid from Kirgyz birch Betula kirghisorum, an endemic plant of the Republic of Kazakhstan. Fundamental and Experimental Biology, 93(1), 14–18. https://doi.org/10.31489/2019bmg1/14-18