Katrien Wijndaele, Lynn Matton, Nathalie Duvigneaud, Johan Lefevre, Ilse De Bourdeaudhuij, William Duquet, Martine Thomis, Renaat M. Philippaerts,
Association between leisure time physical activity and stress, social support and coping: A cluster-analytical approach Psychology of Sport and Exercise. ,vol. 8, pp. 425- 440 ,(2007) ,
10.1016/J.PSYCHSPORT.2006.08.001