by Proper, Karin I., Heymans, Martijn W., Paw, Marijke J.M. Chin A., van Sluijs, Esther M.F., van Poppel, Mireille N.M., van Mechelen, Willem
Published in Journal of science and medicine in sport (01.10.2006)

by de Jong, N, Paw, MJ, de Groot, LC, Hiddink, GJ, van Staveren, WA
Published in American journal of public health (1971) (01.06.2000)