Assessment of physical activity - a review of methodologies with reference to epidemiological research: a report of the exercise physiology section of the European Association of Cardiovascular Prevention and Rehabilitation.
Warren JM, Ekelund U, Besson H, Mezzani A, Geladas N, Vanhees L
European journal of cardiovascular prevention and rehabilitation : official journal of the European Society of Cardiology, Working Groups on Epidemiology & Prevention and Cardiac Rehabilitation and Exercise Physiology. Mar 2010
(DOI : 10.1097/HJR.0b013e32832ed875)