JOHN NGANGSI NGAH; JULIUS K. TANGKA; MATHIAS N.W. EVINA. HOMEMADE HELICOPTER DESIGN AND VIBRATIONAL ANALYSIS. International Journal of Innovations in Engineering Research and Technology, Maharashatra, India, v. 9, n. 02, p. 5–17, 2022. DOI: 10.17605/OSF.IO/K375X. Disponível em: https://repo.ijiert.org/index.php/ijiert/article/view/3031.. Acesso em: 18 may. 2024.