Šebo, Juraj, Peter Maleg, Jozef Mihok, and Dušan Šebo. 2006. “Mould Effeciency As an Element of Production Effeciency”. Advanced Technologies and Materials 31 (1-2):101-7. https://jged.uns.ac.rs/index.php/atm/article/view/jtp.2006.31.1-2.9.