@bookKuball_Uhe_Meschut_Merklein_2020, series=Procedia Manufacturing, title=Process design for the forming of semi-tubular self-piercing rivets made of high nitrogen steel, volume=50, DOI=10.1016/j.promfg.2020.08.052, year=2020, pages=280–285, collection=Procedia Manufacturing 

@bookKuball_Jung_Uhe_Meschut_Merklein_2020, series=Journal of Advanced Joining Processes, title=Influence of the process temperature on the forming behaviour and the friction during bulk forming of high nitrogen steel, volume=1, DOI=10.1016/j.jajp.2020.100023, number=100023, year=2020, collection=Journal of Advanced Joining Processes