D. A. Alva Huamán, S. A. Castañeda Vásquez, and M. R. Portilla Castañeda, “COAL DESULFURIZATION BY LEACHING WITH NITRIC ACID FOR THE MANUFACTURE OF BRIQUETTES IN THE LLARAY HAMLET - LA LIBERTAD, 2023”, LACCEI, vol. 1, no. 10, July 2024, doi: 10.18687/LACCEI2024.1.1.1015.