BAIMOLDA, D.; CECHAK, T.; SHYNGYSOVA , S. DETERMINATION OF ASH CONTENT IN COAL BY X-RAY FLUORESCENCE ANALYSIS. Bulletin of Abai KazNPU. Series of Physical and mathematical sciences, Алматы, Казахстан, v. 73, n. 1, p. 82–84, 2021. DOI: 10.51889/2021-1.1728-7901.11. Disponível em: https://bulletin-phmath.kaznpu.kz/index.php/ped/article/view/260. Acesso em: 22 nov. 2024.