621.9 lubricating. drawingRidzoň, Martin, 1984- The Effect of Technological Parameters Influencing the Properties of Seamless Cold-Drawn Tubes. -- 1st ed. -- Köthen : Hochschule Anhalt, 2012. -- 89 s. -- ISBN : 978-3-86011-048-5. Lipa, Zdenko, 1944-. Srnka, Milan