# Momentum routing invariance in extended QED: Assuring gauge invariance beyond tree level

> Research article (Physical review. D/Physical review. D., 2016) · cited 18× · AI/ML

**Wikidata**: [openalex:W1770332575](https://www.wikidata.org/wiki/openalex:W1770332575)  
**Source**: https://4ort.xyz/entity/momentum-routing-invariance-in-extended-qed-assuring-gauge-invariance-beyond-tree-level