Radev, Rossen, Valentin Gagov, Danail Gospodinov, and Emil Yankov. 2014. “Metal Forming Simulation of Ultrafine-Grained Aluminum Alloys”. Advanced Technologies and Materials 39 (1):1-10. https://atm-journal.uns.ac.rs/index.php/atm/article/view/JTP.2014.39.1.1.