Source: https://www.researchgate.net/profile/Nadine-Richez-Battesti/publication/239920293_Tourisme_solidaire_innovation_et_reseau_Analyse_comparee_France-Italie/links/54f587950cf2f28c1364e1ab/Tourisme-solidaire-innovation-et-reseau-Analyse-comparee-France-Italie.pdf