Byrne, Elaine, et al. “Peer interviewing in medical education research: Experiences and perceptions of student interviewers and interviewees.” BMC Research Notes 8(513), 2015, https://doi.org/10.1186/s13104-015-1484-2. 

Mayring, Philipp. Qualitative Inhaltsanalyse: Grundlagen und Techniken. 11. Ed., Beltz, 2010.