Gou, X., Xu, X., Xu, Z. and Skare, M. 2024. Circular economy and fuzzy set theory: a bibliometric and systematic review based on Industry 4.0 technologies perspective. Technological and Economic Development of Economy. 30, 2 (May 2024), 489–526. DOI:https://doi.org/10.3846/tede.2024.20286.