Братков, И., О. Чагин, А. Иванов, А. Колчин, and И. Савицкий. “THE USE OF MICROWAVE RADIATION IN THE PROCESSES OF PYROHYDROMETALLURGICAL PURIFICATION OF NATURAL GRAPH”. Modern High Technologies. Regional Application, Vol. 78, no. 2, July 2024, pp. 104-12, https://snt-isuct.ru/article/view/5977.