# A perspective on two chemometrics tools: PCA and MCR, and introduction of a new one: Pattern recognition entropy (PRE), as applied to XPS and ToF-SIMS depth profiles of organic and inorganic materials

> Research article (Applied Surface Science, 2017) · cited 49× · AI/ML

**Wikidata**: [openalex:W2760261531](https://www.wikidata.org/wiki/openalex:W2760261531)  
**Source**: https://4ort.xyz/entity/a-perspective-on-two-chemometrics-tools-pca-and-mcr-and-introduction-of-a-new-one-pattern-recognition-entropy-pre-as-app