Kuropatwa, Michal, Nicolas Wegrzyn, and Jaroslaw Kozuba. “Turbofan Engines Efficiency, Historical Trends, and Future Prediction”. Safety & Defense 8, no. 2 (December 15, 2022): 82-90. Accessed February 7, 2023. https://sd-magazine.eu/index.php/sd/article/view/186.