# The Constrained Air Transport Energy Paradigm in 2021

> Research article (Sustainability, 2021) · cited 14× · AI/ML

**Wikidata**: [openalex:W3135642817](https://www.wikidata.org/wiki/openalex:W3135642817)  
**Source**: https://4ort.xyz/entity/the-constrained-air-transport-energy-paradigm-in-2021