Source: https://www.researchgate.net/profile/Eric_Sabourin/publication/260515575_Les_tensions_entre_lien_social_et_interets_materiels_dans_les_processus_d'action_collective/links/0c96053177c2347992000000/Les-tensions-entre-lien-social-et-interets-materiels-dans-les-processus-daction-collective.pdf