GLÜER, Michael and Arnold LOHAUS. Participation in social network sites: Associations with the quality of offline and online friendships in German preadolescents and adolescents. Cyberpsychology: Journal of Psychosocial Research on Cyberspace. 2016, vol. 10, no. 2, p. Article 2. DOI: 10.5817/CP2016-2-2