# Small Obstacle in a Large Polar Flock

> Research article (Physical Review Letters, 2022) · cited 26× · AI/ML

**Wikidata**: [openalex:W4226330133](https://www.wikidata.org/wiki/openalex:W4226330133)  
**Source**: https://4ort.xyz/entity/small-obstacle-in-a-large-polar-flock