Worlitz, Jane, Anne Stabler, Stefan Peplowsky, and Ralf Woll. “Video Tutorials: An Appropriate Way of Teaching QM Tools Applied With Software”. Quality Innovation Prosperity 20, no. 2 (December 31, 2016): 169–184. Accessed September 18, 2021. https://www.qip-journal.eu/index.php/QIP/article/view/754.