De Decker E, De Craemer M, De Bourdeaudhuij I, Wijndaele K, Duvinage K, Androutsos O, Iotova V, Lateva M, Alvira JM, Zych K, Manios Y, and Cardon G
The Journal of school health. Dec 2011
(DOI : 10.1111/josh.12078)