# Mobile phone usage in complex urban systems: a space–time, aggregated human activity study

> Research article (Journal of Geographical Systems, 2015) · cited 36× · AI/ML

**Wikidata**: [openalex:W2074668552](https://www.wikidata.org/wiki/openalex:W2074668552)  
**Source**: https://4ort.xyz/entity/mobile-phone-usage-in-complex-urban-systems-a-spacetime-aggregated-human-activity-study