# Hopf Bifurcation, Positively Invariant Set, and Physical Realization of a New Four‐Dimensional Hyperchaotic Financial System

> Research article (Mathematical Problems in Engineering, 2017) · cited 32× · AI/ML

**Wikidata**: [openalex:W2605711220](https://www.wikidata.org/wiki/openalex:W2605711220)  
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