1. IFH Köln: Handelsszenario Wachtsumsparadoxen im deutschen Einzelhandel (2030). https://www.ifhkoeln.de/pressemitteilungen/details/handelsszenario-2030-wachstumsparadoxon-im-deutschen-einzelhandel/. Accessed 13 July 2020
2. Bollweg, L., Lackes, R., Siepermann, M., Weber, P.: Digitalization of local owner-operated retail outlets: between customer demand, competitive challenge and business persistence. In: 15 WI 2020, pp. 1004–1018 (2020)
3. Koren, M., Peto, R.: It’s retail stores and restaurants, not farms and fisheries that suffer most from social distancing. VoxEU.org (2020). https://voxeu.org/article/it-s-retail-stores-and-restaurants-not-farms-and-fisheries-suffer-most-social-distancing? Accessed 13 July 2020
4. Coyle, D., Nguyen, D.: The impact of Covid-19 on the value of online goods. https://voxeu.org/article/impact-covid-19-value-online-goods. Accessed 24 Aug 2020
5. Statistisches Bundesamt (Destatis): Pressemitteilung Nr. 151 vom 30. April (2020). https://www.destatis.de/DE/Presse/Pressemitteilungen/2020/04/PD20_151_45212.html. Accessed 13 July 2020