TY  - RPRT
TI  - The controlled single subject trial.
AU  - T Johannessen
AU  - H Petersen
AU  - P Kristensen
AU  - D Fosstvedt
PY  - 1991
DO  - 10.3109/02813439109026576
UR  - https://pubmed.ncbi.nlm.nih.gov/1675018/
ID  - 1675018
ER  -