Richartz, P. Christoph, Awudu Abdulai, and Lukas Kornher. “Attribute Non-Attendance and Consumer Preferences for Online Food Products in Germany”. German Journal of Agricultural Economics 69, no. 1 (February 28, 2020). Accessed November 24, 2024. https://www.tib-op.org/ojs/index.php/gjae/article/view/2162.