“Predictions of Hardness and Impact Toughness Using Chemical Composition and Tensile Characteristics Measurements in Microalloyed API X70 Pipeline Steels”. 2015. Journal of Mining and Metallurgy, Section B: Metallurgy 51 (2): 173-78. https://test.aseestant.ceon.rs/index.php/jmm/article/view/6143.