Zawacki-Richter, Olaf, and Berrin Cefa. “Is Open, Distance, and Digital Education (ODDE) Good for the Environment? A Systematic Review of Carbon Footprint Studies”. Online Learning 30, no. 3 (September 1, 2026). Accessed September 2, 2026. https://olj.onlinelearningconsortium.org/index.php/olj/article/view/5370.