# Direct trajectory optimization framework for vertical takeoff and vertical landing reusable rockets: case study of two-stage rockets

> Research article (Engineering Optimization, 2018) · cited 24× · AI/ML

**Wikidata**: [openalex:W2811502652](https://www.wikidata.org/wiki/openalex:W2811502652)  
**Source**: https://4ort.xyz/entity/direct-trajectory-optimization-framework-for-vertical-takeoff-and-vertical-landing-reusable-rockets-case-study-of-two-st