Petras, Ole2018-10-092018-10-092016https://www.uni-muenster.de/Ejournals/index.php/pop/article/view/1818/1763https://mediarep.org/handle/doc/3803deuIn CopyrightSmartphoneMobile MedienAppFotografie600Bilder-Apps10.25969/mediarep/1340nbn:de:101:1-20200522113554403438732198-0322