TY  - RPRT
TI  - Developing an empirical typology for regular exercise.
AU  - Gregory J Norman
AU  - Wayne F Velicer
PY  - 2003
DO  - 10.1016/j.ypmed.2003.09.011
UR  - https://pubmed.ncbi.nlm.nih.gov/14636797/
ID  - 14636797
ER  -