Methods of Measurement in epidemiology: Sedentary Behaviour
Brage S, Atkin AJ, Biddle SJ, Clemes SA, Edwardson C, Gorely T, Marshall SJ, Salmon J, Yates T
International Journal of Epidemiology. Jul 2012
(DOI : http://dx.doi.org/10.1093/ije/dys118)