Cvjetkovic, V. M., Matijevic, M. S., Grujovic, M. D., & Stefanovic, M. Z. (2009). Helicopter Laboratory Model Experiment With Web Access. International Journal of Online and Biomedical Engineering (iJOE), 5(5), pp. 8–12. https://doi.org/10.3991/ijoe.v5i5.1015