TY  - RPRT
TI  - Students as tutors in problem-based learning: does it work?
AU  - M L Johansen
AU  - D F Martenson
AU  - J Bircher
PY  - 1992
DO  - 10.1111/j.1365-2923.1992.tb00143.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1565034/
ID  - 1565034
ER  -