Straub, Tim, Marc Kohler, Peter Hottum, Volker Arrass, and Dennis Welter. “Customer Integration in Service Innovation: An Exploratory Study”. Journal of Technology Management & Innovation 8, no. 3 (September 29, 2013): 25–33. Accessed April 20, 2024. https://www.jotmi.org/index.php/GT/article/view/art393.