# The Virtual Sleep Lab—A Novel Method for Accurate Four-Class Sleep Staging Using Heart-Rate Variability from Low-Cost Wearables

> Research article (Sensors, 2023) · cited 21× · AI/ML

**Wikidata**: [openalex:W4321497845](https://www.wikidata.org/wiki/openalex:W4321497845)  
**Source**: https://4ort.xyz/entity/the-virtual-sleep-laba-novel-method-for-accurate-four-class-sleep-staging-using-heart-rate-variability-from-low-cost-wea