Koppenborg, Markus, and Katrin B. Klingsieck. “Social Factors of Procrastination: Group Work Can Reduce Procrastination among Students.”https://doi.org/10.1007/s11218-021-09682-3__Social Psychology of Education 25, no. 1 (2022): 249–74.https://doi.org/10.1007/s11218-021-09682-3 .

Nordby, Kent, Katrin B. Klingsieck, and Frode Svartdal. “Do Procrastination-Friendly Environments Make Students Delay Unnecessarily?”https://doi.org/10.1007/s11218-017-9386-x__Social Psychology of Education, 2017, 491–512.https://doi.org/10.1007/s11218-017-9386-x .