Łusiak, Tomasz, Radosław Witczak, and Arkadiusz Małek. “Analysis of the Performance of a New Type of Rotorcraft”. AUTOBUSY – Technika, Eksploatacja, Systemy Transportowe 24, no. 6 (June 30, 2019): 206–211. Accessed June 21, 2024. https://journals.economic-research.pl/atest/article/view/1677.