N. M. Kilany, A. S. M. Al Luhayb, R. Alotaibi, and L. H. El-Refai, “Proportional Hazard Bivariate Chen Model and Its Mathematical Features with Applications on Environmental, Climatic and Medical Data”, Math. Sci., vol. 20, no. 3, Sep. 2026, doi: 10.57647/mathsci.2026.2003.37.