1. The art and science of clinical knowledge: evidence beyond measures and numbers;Malterud;Lancet,2001
2. Naturalistic inquiry;Lincoln,1985
3. Qualitative data analysis: an expanded sourcebook;Miles,1994
4. Qualitative research methods in general practice and primary care;Britten;Fam Pract,1995
5. Inter Views: an introduction to qualitative research writing;Kvale,1996