Kühn, Thomas, and Andreas Witzel. “Strategies in Using a Qualitative Database for the Analysis of Problem-Centered Interviews”. Forum Qualitative Sozialforschung / Forum: Qualitative Social Research 1, no. 3 (December 31, 2000). Accessed March 31, 2025. https://www.qualitative-research.net/index.php/fqs/article/view/1035.