“The Effect of Casting Modulus in Hypo-Eutectic Ductile Iron Unalloyed and Alloyed With Nickel on Microstructure and Mechanical Properties”. 2019. Journal of Mining and Metallurgy, Section B: Metallurgy 55 (2): 283. https://test.aseestant.ceon.rs/index.php/jmm/article/view/19150.