A. Grigorov, “Comparative Analysis between Single- and Two-Stage District Water Heating by Backpressure Steam Turbine”, IJSBAR, vol. 27, no. 1, pp. 187–198, May 2016, Accessed: Jan. 25, 2026. [Online]. Available: https://gssrr.org/JournalOfBasicAndApplied/article/view/5634