Enk, Tobias, Peter Urban, Michael Dattner, Hannes Vomhoff, and Axel Heise. “Influence of Paperboard Production on Web Movement and Register Quality in Printing Process: DOI 10.14622/JPMTR-2009”. Journal of Print and Media Technology Research 9, no. 2 (June 30, 2020): 103–114. Accessed April 22, 2021. http://jpmtr.org/index.php/journal/article/view/16.