# Gravitational radiation close to a black hole horizon: Waveform regularization and the out-going echo

> Research article (Physical review. D/Physical review. D., 2021) · cited 13× · AI/ML

**Wikidata**: [openalex:W3189226958](https://www.wikidata.org/wiki/openalex:W3189226958)  
**Source**: https://4ort.xyz/entity/gravitational-radiation-close-to-a-black-hole-horizon-waveform-regularization-and-the-out-going-echo