Kuznetsova, Svetlana Alekseyevna, Robert Zus’yevich Pen, and Boris Nikolayevich Kuznetsov. “OPTIMIZATION OF THE PROCESS OF BIOLOGICALLY – ACTIVE BETULIN DIPROPIONATE PRODUCTION FROM OUTER BIRCH BARK”. chemistry of plant raw material0, no. 1 (March 16, 2021): 309-316. Accessed August 17, 2024. http://journal.asu.ru/cw/article/view/7973.