# Revised LOFAR upper limits on the 21-cm signal power spectrum at <i>z</i> ≈ 9.1 using machine learning and gaussian process regression

> Research article (Monthly Notices of the Royal Astronomical Society Letters, 2024) · cited 22× · AI/ML

**Wikidata**: [openalex:W4401771550](https://www.wikidata.org/wiki/openalex:W4401771550)  
**Source**: https://4ort.xyz/entity/revised-lofar-upper-limits-on-the-21-cm-signal-power-spectrum-at-i-z-i-9-1-using-machine-learning-and-gaussian-process-r