J. Szabó, Péter, Péter Bereczki, and Balázs Verő. 2011. “The Effect of Multiaxial Forging on the Grain Refinement of Low Alloyed Steel”. Periodica Polytechnica Mechanical Engineering 55 (1):63-66. https://doi.org/10.3311/pp.me.2011-1.09.