1. Evaluating soft findings: some problems of measuring informal care;Abrahams;Research, Policy and Planning,1984
2. Qualitative research in psychology,1986
3. Content analysis in communication research;Berelson,1971
4. Qualitative research methods for the social sciences;Berg,1989
5. The debate about quantitative and qualitative research: a question of method or epistemology?;Bryman;British Journal of Sociology,1984