TY  - RPRT
TI  - Variable practice in learning the forehand drive in tennis.
AU  - Stavros J Douvis
PY  - 2005
DO  - 10.2466/pms.101.2.531-545
UR  - https://pubmed.ncbi.nlm.nih.gov/16383091/
ID  - 16383091
ER  -