Kiranchev, Georgi. “Limitation of the Used Criteria for a Choice of Investment’s Variant in the Case of Small Hydropower Plants ‘Run-Of-The-River’”. Research Papers, no. 1 (March 19, 2009): 235–262. Accessed July 23, 2026. https://yb.e-dnrs.org/index.php/rp/article/view/5767.