Ivshina, I. (2017) “CHEMICAL AND ENZYMATIC SYNTHESIS OF BIOLOGICALLY ACTIVE COMPOUNDS BASED ON BETULIN”, Perm Federal Research Centre Journal, (2), pp. 46–53. Available at: https://journal-dev.icmm.ru/index.php/pscj/article/view/PSCJ2017n2p6 (Accessed: 6 November 2026).