CC BY 4.0Diekmann, JanisJanisDiekmannJäger, AngelaAngelaJägerKötter, WolfgangWolfgangKötterZanker, ChristophChristophZanker2022-03-0616.9.20202020https://publica.fraunhofer.de/handle/publica/26416010.24406/publica-fhg-264160de303600Mixed-Method-Design: Ineinandergreifen der Untersuchungsebenenbook article