Sakshaug, J. W., J. Beste, M. Coban, T. Fendel, G.-C. Haas, S. Hülle, Y. Kosyakova, C. König, F. Kreuter, B. Küfner, B. Müller, C. Osiander, S. Schwanhäuser, G. Stephan, E. Vallizadeh, M. Volkert, C. Wenzig, C. Westermeier, C. Zabel, and S. Zins. “Impacts of the COVID-19 Pandemic on Labor Market Surveys at the German Institute for Employment Research”. Survey Research Methods, Vol. 14, no. 2, June 2020, pp. 229-33, doi:10.18148/srm/2020.v14i2.7743.