Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI)
BOOTH ML,The reliability and validity of the physical activity questions in the WHO health behaviour in schoolchildren (HBSC) survey : a population study,Br J Sports Med,,,2001,35,,263-267,https://cir.nii.ac.jp/crid/1570572700106229888,