GUGOV, Dimitar; TODOROV, Marin; STREBLAU, Maik Jurgen; DIMOVA, Tatyana. Experimental Study of the Characteristic of a PEM Reversible Fuel Cell. ANNUAL JOURNAL OF TECHNICAL UNIVERSITY OF VARNA, BULGARIA, [S. l.], v. 6, n. 1, p. 28–33, 2022. DOI: 10.29114/ajtuv.vol6.iss1.263. Disponível em: https://aj.tu-varna.bg/index.php/ajtuv/article/view/263. Acesso em: 2 oct. 2025.