„Establishing of Rolling - Friction Coefficient, for Hertzian Contacts Between Steel Balls and Different Kinds of Thermochemical Treated Steel Surfaces“, Ann_UGAL_MMS, Bd. 28, Nr. 2, S. 41–47, Nov. 2005, Zugegriffen: Nov. 02, 2026. Verfügbar unter: https://ojs.ugal.ro/index.php/mms/article/view/3249