# Stochastic analysis of torsional drill-string vibrations considering the passage from a soft to a harder rock layer

> Research article (Journal of the Brazilian Society of Mechanical Sciences and Engineering, 2017) · cited 31× · AI/ML

**Wikidata**: [openalex:W2613531431](https://www.wikidata.org/wiki/openalex:W2613531431)  
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