# Three-echelon supply chain model in an imperfect production system with inspection error, learning effect, and return policy under fuzzy environment

> Research article (International Journal of Systems Science Operations & Logistics, 2021) · cited 26× · AI/ML

**Wikidata**: [openalex:W3195636948](https://www.wikidata.org/wiki/openalex:W3195636948)  
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