Radev, R., V. Gagov, D. Gospodinov, and E. Yankov. “Metal Forming Simulation of Ultrafine-Grained Aluminum Alloys”. Advanced Technologies and Materials, vol. 39, no. 1, June 2014, pp. 1-10, https://jged.uns.ac.rs/index.php/atm/article/view/JTP.2014.39.1.1.