Kumm, Martin, and Jens Wellhausen. “HYBRID DRIVE TRAINS FOR LIGHT AIRCRAFTS”. HUMAN. ENVIRONMENT. TECHNOLOGIES. Proceedings of the Students International Scientific and Practical Conference, no. 21 (April 19, 2017): 151–157. Accessed December 22, 2024. https://journals23.rta.lv/index.php/HET/article/view/3554.