# Alleviating data sparsity problem in time-aware recommender systems using a reliable rating profile enrichment approach

> Research article (Expert Systems with Applications, 2021) · cited 77× · AI/ML

**Wikidata**: [openalex:W3196384639](https://www.wikidata.org/wiki/openalex:W3196384639)  
**Source**: https://4ort.xyz/entity/alleviating-data-sparsity-problem-in-time-aware-recommender-systems-using-a-reliable-rating-profile-enrichment-approach