T. Liszkai and J. Farkas, “Minimum cost design of ring and stringer stiffened cylindrical shells”, Comp. Assist. Methods Eng. Sci., vol. 6, no. 3-4, pp. 425–437, Dec. 1999, Accessed: Apr. 19, 2026. [Online]. Available: http://cames.ippt.gov.pl/index.php/cames/article/view/1302