TY  - RPRT
TI  - Crossover trials comparing several treatments.
AU  - R G Newcombe
PY  - 1992
DO  - 10.1111/j.1600-051x.1992.tb02171.x
UR  - https://pubmed.ncbi.nlm.nih.gov/1452805/
ID  - 1452805
ER  -