Grigorov, Alexander. “Comparative Analysis Between Single- and Two-Stage District Water Heating by Backpressure Steam Turbine”. International Journal of Sciences: Basic and Applied Research (IJSBAR) 27, no. 1 (May 13, 2016): 187–198. Accessed October 1, 2025. https://gssrr.org/JournalOfBasicAndApplied/article/view/5634.