1. B. Demirci, K. H. C. Başer, F. Demirci, M. T. Hamann, New caryophyllene derivatives from Betula litwinowii, Journal of Natural Products, 63(7) (2000) 902-904.;
2. P. Beck, G. Caudullo, D. de Rigo, W. Tinner, in European Atlas of Forest Tree Species, J. San-Miguel-Ayanz, D. de Rigo, G. Caudullo, T. Houston Durrant, A. Mauri (Eds.), Publications Office of the European Union, Luxembourg, 2016, pp. e010226.;
3. The Plant List, version 1.1, 23. March 2013, retrieved from http://www.theplantlist.org/ (accessed 1st May 2019).;
4. S. Rastogi, M. M. Pandey, A. K. S. Rawat, Medicinal plants of the genus Betula -Traditional uses and a phytochemicalpharmacological review, Journal of Ethnopharmacology, 159 (2015) 62-83.;
5. A. Mashentseva, W. Dehaen, T. S. Seitembetov, A. J. Seitembetova, Comparison of the antioxidant activity of the different Betula Pendula Roth. extracts from Northen Kazakhstan, Journal of Phytology, 3(1) (2011) 18-25.;