Obied Balod, A. “Theoretical Determination of the Formability of (AA5182 / Polypropylene/ AA5182)sandwich Sheets Using Different Yield Criterion”. Al-Rafidain Engineering Journal (AREJ), vol. 18, no. 2, Apr. 2010, pp. 32-49, doi:10.33899/rengj.2010.28257.