Harrison, Helena, Melanie Birks, Richard Franklin, and Jane Mills. “Case Study Research: Foundations and Methodological Orientations”. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research 18, no. 1 (January 24, 2017). Accessed April 24, 2024. https://www.qualitative-research.net/index.php/fqs/article/view/2655.