Nikolov, Kalin, Mihail Simov, and Maik Jurgen Streblau. 2022. “Experimental Study on HHO Electrolyzer Efficiency – Influence of the Number of Plates and Their Distance”. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA 6 (1):18-27. https://doi.org/10.29114/ajtuv.vol6.iss1.252.