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Robuta

https://www.econstor.eu/handle/10419/52713
EconStor: Implications of external validity for research on polycentric and complex adaptive systems
EconStor is a publication server for scholarly economic literature, provided as a non-commercial public service by the ZBW.
external validityeconstorimplicationsresearchpolycentric
https://jmir.org/2013/10/e224/citations
Journal of Medical Internet Research - Assessing the Internal and External Validity of Mobile...
Background: Mobile health (mHealth) interventions are effective in promoting physical activity (PA); however, the degree to which external validity indicators...
internet researchjournalmedicalinternalexternal