TY  - RPRT
TI  - Can evaluation studies benefit from triangulation? A case study.
AU  - Elske Ammenwerth
AU  - Carola Iller
AU  - Ulrich Mansmann
PY  - 2003
DO  - 10.1016/s1386-5056(03)00059-5
UR  - https://pubmed.ncbi.nlm.nih.gov/12909175/
ID  - 12909175
ER  -