TY  - RPRT
TI  - Theory and technique of problem-oriented therapy.
AU  - A Blaser
AU  - C Ringer
AU  - M Thommen
AU  - E Heim
PY  - 1990
DO  - 10.1159/000288362
UR  - https://pubmed.ncbi.nlm.nih.gov/2290895/
ID  - 2290895
ER  -