Сидорова, Л., Е. Кацнельсон, and О. Балаева-Тихомирова. “BIOCHEMICAL STUDIES ON THE NATURAL OBJECTS IN THE ORGANIZATION OF CHEMICAL EXPERIMENT AT SCHOOL”. SWorldJournal, vol. 5, no. 08-05, May 2021, pp. 77-85, doi:10.30888/2663-5712.2021-08-05-057.