# Off-shell strings I: S-matrix and action

> Research article (SciPost Physics, 2024) · cited 17× · AI/ML

**Wikidata**: [openalex:W4400360573](https://www.wikidata.org/wiki/openalex:W4400360573)  
**Source**: https://4ort.xyz/entity/off-shell-strings-i-s-matrix-and-action