Gugov D, Todorov M, Streblau MJ, Dimova T. Experimental Study of the Characteristic of a PEM Reversible Fuel Cell. AJTUV [Internet]. 2022 Jul. 30 [cited 2025 Oct. 2];6(1):28-33. Available from: https://aj.tu-varna.bg/index.php/ajtuv/article/view/263