Danev, Dragi, and Jovan Lazarev. 1977. “Prilog Za Opredeluvanje Na Napreganjeto Na tečenje Na Materijalot Pri Toploto Valanje”. Advanced Technologies and Materials 4 (December):77-83. https://atm-journal.uns.ac.rs/index.php/atm/article/view/JTP.1977.4.1.6.