Hernandez, J. C., M. C. Mira, G. Sen, O. C. Thomsen, and M. A. E. Andersen. 2014. “Wide Operating Voltage Range Fuel Cell Battery Charger”. Elektronika Ir Elektrotechnika 20 (5):97-103. https://doi.org/10.5755/j01.eee.20.5.7107.