# Development of TOPSIS Technique under Pythagorean Fuzzy Hypersoft Environment Based on Correlation Coefficient and Its Application towards the Selection of Antivirus Mask in COVID‐19 Pandemic

> Research article (Complexity, 2021) · cited 53× · AI/ML

**Wikidata**: [openalex:W3136052643](https://www.wikidata.org/wiki/openalex:W3136052643)  
**Source**: https://4ort.xyz/entity/development-of-topsis-technique-under-pythagorean-fuzzy-hypersoft-environment-based-on-correlation-coefficient-and-its-a