Aduev, B.P., G.M. Belokurov, I.Yu. Liskov, D.R. Nurmukhametov, and Z.R. Ismagilov. “Ignition of Low-Metamorphized Coal With Continuous Lasers at Wavelengths 450 Nm and 808 Nm”. Eurasian Chemico-Technological Journal 24, no. 2 (July 25, 2022): 93-101. Accessed November 28, 2022. https://ect-journal.kz/index.php/ectj/article/view/1321.