Abyan, M. I., A. Nuryaman, B. H. . Jihad, S. F. . Junjunan, and A. Asmiati. “Design Optimization of Propellant Grain and Nozzle Contour to Improve Performance of Solid Rocket Propulsion”. Journal of Engineering and Technological Sciences, vol. 54, no. 5, Sept. 2022, p. 220508, doi:10.5614/j.eng.technol.sci.2022.54.5.8.