# A bi-objective two-echelon pollution routing problem with simultaneous pickup and delivery under multiple time windows constraint

> Research article (OPSEARCH, 2021) · cited 21× · AI/ML

**Wikidata**: [openalex:W3127165636](https://www.wikidata.org/wiki/openalex:W3127165636)  
**Source**: https://4ort.xyz/entity/a-bi-objective-two-echelon-pollution-routing-problem-with-simultaneous-pickup-and-delivery-under-multiple-time-windows-c