# RETRACTED ARTICLE: A robust feature extraction with optimized DBN-SMO for facial expression recognition

> Research article (Multimedia Tools and Applications, 2020) · cited 22× · AI/ML

**Wikidata**: [openalex:W3023005488](https://www.wikidata.org/wiki/openalex:W3023005488)  
**Source**: https://4ort.xyz/entity/retracted-article-a-robust-feature-extraction-with-optimized-dbn-smo-for-facial-expression-recognition