[1]
A. Grigorov, “Exergy Efficiency of Bulgarian Lignite fired Steam Boiler P-62 at various Load and Fuel Quality”, IJSBAR, vol. 30, no. 4, pp. 138–146, Dec. 2016, Accessed: Nov. 01, 2025. [Online]. Available: https://gssrr.org/JournalOfBasicAndApplied/article/view/6556