Anchev, Angel, Borislav Stoyanov, Milka Atanasova, Yaroslav Argirov, and Boris Petkov. 2025. “Improving in Microhardness of C45 Steel Obtained via Electron Beam Hardening Using a One-Factor-at-a-Time Technique”. International Journal of Innovative Research and Scientific Studies 8 (5):1255-70. https://doi.org/10.53894/ijirss.v8i5.9089.