H. Matti, R. and Rafi K. Al-bazzaz, D. 2013. Buckling behavior of aluminum plate with circular and elliptical shapes of central cutout. Al-Rafidain Engineering Journal (AREJ). 21, 3 (Jun. 2013), 1–10. DOI:https://doi.org/10.33899/rengj.2013.75426.