Priymak, Elena, et al. “Influence of Friction Pressure at a Given Burn-off Length on the Mechanical and Microstructural Properties of Welded Joints from Medium-Carbon Alloyed Steels in Rotaty Friction Welding”. International Journal of Engineering & Technology, vol. 7, no. 4.36, Dec. 2018, pp. 978-82, https://doi.org/10.14419/ijet.v7i4.36.24934.